Mental & Physical Health
Complete review of all 5 official topics — health psychology and stress (GAS, tend-and-befriend, coping), positive psychology (well-being, gratitude, posttraumatic growth), classifying disorders (DSM, biopsychosocial, diathesis-stress), categories of psychological disorders (9 major groups), and treatment (psychotherapies, ethical principles, biomedical interventions). Strictly aligned to 2026 CED.
Introduction to Health Psychology
Health psychology is the subfield of psychology that studies how psychological, behavioral, and cultural factors influence physical health and illness — the interface between mind and body. It focuses on prevention, treatment, and health promotion alongside understanding how stress affects well-being.
Health Psychology and Psychoneuroimmunology enrichment
Studies how emotions, stress, personality, and lifestyle choices influence physical health outcomes. Applied to prevention (reducing risky behaviors), treatment adherence, and understanding how psychological states alter susceptibility to disease. Addresses the biological, psychological, and social determinants of health simultaneously.
The scientific study of how psychological processes, the nervous system, and the endocrine system interact to influence immune function and health outcomes. Chronic stress elevates cortisol, which suppresses immune cell activity (lymphocytes, natural killer cells), reduces antibody production, and increases inflammatory markers — leaving the body more vulnerable to infection and slower to heal.
Stress: Core Concepts
Stress is the process by which we perceive and respond to events appraised as threatening or challenging. Not all stress is negative:
| Type | Definition | Effect |
|---|---|---|
| Eustress | Positive, motivating stress that enhances performance; the stressor is perceived as a manageable challenge or exciting opportunity | Improves focus, energy, and performance; associated with growth and accomplishment |
| Distress | Negative stress that overwhelms coping resources; the stressor is perceived as threatening or unmanageable | Leads to anxiety, health problems, and impaired performance; chronic distress suppresses immune function |
Adverse Childhood Experiences (ACEs) — stressful or traumatic events occurring during the first 18 years of life (abuse, neglect, household dysfunction, witnessing domestic violence) — are sources of chronic stress with lasting effects on physical and mental health across the lifespan. ACEs increase risk for depression, substance use, cardiovascular disease, and immune dysfunction.
General Adaptation Syndrome (GAS — Selye)
Hans Selye described a three-stage biological response to sustained stress that is common across many types of stressors:
| Stage | Physiological Response | Key Feature |
|---|---|---|
| 1. Alarm Reaction | Sympathetic nervous system activates; fight-flight-freeze response; adrenaline and cortisol released; heart rate increases, blood flow redirected to muscles | Initial mobilization against the stressor; equivalent to fight/flight/freeze |
| 2. Resistance | Body remains physiologically aroused and continues to release stress hormones to maintain readiness; adapts to the ongoing stressor | Sustained coping; if the stressor continues too long, resources begin to deplete |
| 3. Exhaustion | Prolonged stress depletes bodily resources; parasympathetic nervous system attempts to restore equilibrium; immune function suppressed | Greatest susceptibility to illness occurs here; chronic stress-related conditions emerge (hypertension, headaches, immune suppression) |
The AP exam frequently tests which phase of GAS produces the greatest susceptibility to illness: the exhaustion phase. This is when prolonged stress has depleted bodily resources and immune suppression is greatest. Also tested: the alarm phase activates the sympathetic nervous system (fight/flight/freeze).
Stress Responses and Coping
| Concept | Definition | Examples |
|---|---|---|
| Fight-Flight-Freeze Response | The immediate physiological response to a perceived threat; sympathetic nervous system activation prepares the body to confront, escape, or become immobile | Increased heart rate, pupil dilation, redirected blood flow, cortisol and adrenaline release |
| Tend-and-Befriend Response | Under stress, people (especially women) tend to their own needs and the needs of others, and seek social connection and support; an alternative to fight-flight that may be more common in women due to oxytocin effects | Seeking out friends or family during stressful times; caring for children when stressed; community bonding after disasters |
| Problem-Focused Coping | Addressing stress by directly changing the stressor or one's interaction with it; treating stress as a problem to solve | Making a plan, seeking advice, taking practical action to resolve the source of stress |
| Emotion-Focused Coping | Addressing stress by managing the emotional response to the stressor; useful when the stressor cannot be changed | Deep breathing, meditation, journaling, seeking emotional support, cognitive reframing |
| Internal Locus of Control | Belief that one controls outcomes through one's own actions; associated with active problem-focused coping and better health outcomes | "I can manage this situation if I take the right steps" |
| External Locus of Control | Belief that outcomes are controlled by luck, fate, or powerful others; associated with more passive coping and worse health outcomes | "Nothing I do will make a difference; it's all out of my hands" |
Personality, Stress, and Physical Health enrichment
| Type | Characteristics | Health Link |
|---|---|---|
| Type A Personality | Competitive, hard-driving, impatient, verbally aggressive, anger-prone, time-pressured; Friedman & Rosenman | Higher risk for coronary heart disease (CHD); hostility and anger components appear most predictive |
| Type B Personality | Relaxed, patient, easygoing, amicable, less competitive; Friedman & Rosenman | Lower risk for CHD; reduced cardiovascular reactivity to stressors |
Coronary heart disease is one of the most documented physical outcomes of chronic stress exposure. Prolonged activation of the stress response elevates blood pressure (hypertension), promotes inflammation, and damages arterial walls over time.
A student preparing for an important exam notices that she becomes sick more often during exam week than at any other time during the year. According to Selye’s General Adaptation Syndrome, this pattern is best explained by the fact that
- (A) the alarm phase activates the parasympathetic nervous system, suppressing immune function
- (B) academic stress constitutes eustress rather than distress, which enhances immune function
- (C) sustained stress depletes bodily resources during the exhaustion phase, increasing susceptibility to illness
- (D) the resistance phase produces cortisol that directly kills white blood cells
Positive Psychology
Positive psychology is the scientific study of human flourishing, with the goal of promoting the strengths and virtues that foster well-being, resilience, positive emotions, and thriving in individuals and communities. It complements traditional psychology’s focus on dysfunction by studying what makes life worth living.
Subjective Well-Being and Its Predictors
Subjective well-being is one’s self-perceived happiness or satisfaction with life — how people evaluate and feel about their own lives. Research in positive psychology identifies several evidence-based ways to improve subjective well-being:
Actively expressing gratitude — through gratitude journals, letters to people who have helped you, or deliberate acknowledgment of positive events — consistently increases subjective well-being. People who regularly count their blessings report higher happiness and life satisfaction than controls.
Regular aerobic exercise improves both physical and mental health, reducing symptoms of depression and anxiety and increasing positive affect. Exercise stimulates endorphin release and promotes neuroplasticity (including hippocampal neurogenesis), producing effects comparable to antidepressants for mild-to-moderate depression.
Mindfulness involves attending to present experiences in a nonjudgmental and accepting manner. Regular practice reduces stress hormones (cortisol), improves emotional regulation, reduces rumination, and increases positive affect. Associated with structural changes in the prefrontal cortex and reduced amygdala reactivity.
Resilience is the personal strength that helps people cope with stress, adversity, and trauma and recover or even grow from difficult experiences. Can be cultivated through social connections, sense of purpose, cognitive flexibility, and positive emotional resources.
Character Strengths and Virtues
Positive psychology researchers identify six core virtues that appear to be valued across all major religions and philosophical traditions. Each virtue encompasses several measurable character strengths:
| Virtue | Core Meaning |
|---|---|
| Wisdom | Cognitive strengths that involve acquiring and using knowledge; creativity, curiosity, open-mindedness, love of learning, perspective |
| Courage | Emotional strengths involving the will to accomplish goals in the face of opposition; bravery, persistence, authenticity, vitality |
| Humanity | Interpersonal strengths involving tending to and befriending others; love, kindness, social intelligence |
| Justice | Civic strengths that underlie healthy community life; teamwork, fairness, leadership |
| Temperance | Strengths that protect against excess; forgiveness, humility, prudence, self-regulation |
| Transcendence | Strengths that forge connections to the larger universe and provide meaning; gratitude, hope, humor, spirituality |
Additional Positive Psychology Concepts
| Concept | Definition | Implication |
|---|---|---|
| Posttraumatic Growth | A positive subjective experience that can result after the experience of trauma or stress — emerging from adversity with a sense of increased personal strength, new possibilities, relating to others, appreciation of life, or spiritual development | Not everyone who experiences trauma develops PTSD; many people report meaningful positive changes. PTG and PTSD can coexist. PTG does not imply the trauma was beneficial, but that some people construct positive meaning from surviving it |
| Feel-Good, Do-Good Phenomenon enrichment | People’s tendency to be more helpful and prosocial when they are already in a good mood; happiness promotes prosocial behavior | Positive emotional states broaden behavioral repertoires and motivate other-directed behavior; connects to broaden-and-build theory from Topic 4.7 |
| Adaptation-Level Phenomenon enrichment | The tendency to evaluate new stimuli relative to a prior neutral level defined by experience — people adapt to their circumstances and recalibrate what feels normal | Explains why lottery winners are not permanently happier and people with disabilities adapt to higher happiness levels than expected; “hedonic treadmill” — we keep returning to a baseline level of happiness regardless of circumstances |
A researcher finds that people who write down three things they are grateful for each night report significantly higher life satisfaction after six weeks than a control group who write about neutral daily events. This finding is most directly consistent with which positive psychology concept?
- (A) Posttraumatic growth, because the participants processed negative events and found meaning in them
- (B) Adaptation-level phenomenon, because participants recalibrated their neutral baseline upward over six weeks
- (C) The relationship between expressing gratitude and increased subjective well-being
- (D) The feel-good, do-good phenomenon, because the positive mood from gratitude caused the participants to help others
Explaining & Classifying Psychological Disorders
A psychological disorder is a disturbance in a person’s thoughts, emotions, or behaviors that causes significant distress or suffering and impairs daily functioning. Identifying and classifying disorders requires careful attention to multiple factors and carries both benefits and risks.
Defining Psychological Disorders: Official CED Criteria (5.3.A.1)
The 2026 CED identifies three factors used to recognize psychological disorders:
| Official Criterion | Definition | Caveat |
|---|---|---|
| Level of Dysfunction | Behavior interferes significantly with a person’s ability to carry out normal daily activities, work, relationships, or self-care | The behavior must genuinely impair functioning, not merely cause inconvenience or be socially unconventional |
| Perception of Distress | Significant subjective suffering caused by the behavior or mental state | Some disorders (like antisocial personality) may cause little personal distress despite causing harm to others; distress alone is insufficient |
| Deviation from Social Norm | Behavior that deviates significantly from the norms and expectations of a culture | Cultural context is critical: deviance alone is insufficient; what counts as deviant varies across time and cultures |
Note: Some frameworks also consider danger (risk of harm to self or others) as a supplementary factor in clinical assessment — but the 2026 CED does not list it as one of the three official criteria for identifying psychological disorders.
Classification Systems
Developed and maintained by the American Psychiatric Association (APA). Provides standardized diagnostic criteria for mental disorders. The current edition is DSM-5-TR (Text Revision). Updated regularly to incorporate new research and address cultural considerations. Strength: standardizes diagnosis, facilitates research and treatment planning. Criticism: may pathologize normal variations; diagnostic categories may not reflect continuous dimensions of behavior.
Developed by the World Health Organization (WHO). A broader international system that classifies all diseases and health conditions, including mental disorders. Used globally for health statistics, insurance, and clinical work. Both classification systems are updated regularly to be responsive to new research and practice advances.
Consequences of Diagnosing Disorders
Diagnosing and classifying psychological disorders has both positive and negative consequences, depending on the nature of the disorder, the individual being diagnosed, and the presence of cultural/societal norms, stigma, racism, sexism, ageism, and discrimination. Diagnosing requires specialized training and the use of evidence-based diagnostic tools.
| Positive Consequences | Negative Consequences |
|---|---|
| Enables appropriate, targeted treatment; gives individuals a framework for understanding their experiences; facilitates research on causes and treatment effectiveness; legitimizes suffering for insurance and legal purposes | Stigma and social discrimination; labeling effects (treating person as their diagnosis); cultural bias in diagnostic criteria; overdiagnosis of normal variation; pathologizing culturally different behavior; racism, sexism, and ageism in diagnosis and treatment patterns |
Psychological Perspectives on Disorders
Most psychologists employ an eclectic approach — drawing on multiple theoretical perspectives — when explaining and treating psychological disorders:
| Perspective | Primary Cause of Disorder | Treatment Implication |
|---|---|---|
| Psychodynamic | Unconscious thoughts, unresolved conflicts, and early childhood experiences drive disordered behavior | Psychodynamic therapy: explore and resolve unconscious material through free association, dream interpretation, analysis of transference |
| Behavioral | Maladaptive learned associations between stimuli and responses; reinforcement history maintains disordered behavior | Behavior therapy: extinguish maladaptive associations, reinforce adaptive behavior; systematic desensitization, exposure therapy |
| Cognitive | Irrational, dysfunctional thought patterns and cognitive distortions produce emotional and behavioral symptoms | Cognitive therapy: identify and challenge distorted thinking patterns; replace with more realistic cognitions |
| Humanistic | Failure to achieve one's full potential; being out of touch with one's genuine feelings; conditional regard blocking growth | Person-centered therapy: unconditional positive regard, empathic listening, authentic therapist relationship |
| Biological | Physical causes: genetics, neurotransmitter imbalances, brain structure abnormalities, or neurological factors | Biomedical treatment: medications, ECT, TMS; addresses underlying biological mechanisms |
| Sociocultural | Social ills — racism, sexism, poverty, discrimination, and social inequality — lie at the heart of many psychological disorders | Community and social interventions; address structural factors; cultural humility in treatment |
| Evolutionary | Psychological disorders may represent evolved responses that were adaptive in ancestral environments but produce dysfunction in modern contexts; genes related to disorders may have been selected because they offered advantages in other circumstances | Evolutionary perspective informs understanding of why certain disorder patterns (heightened threat response, social anxiety) are so common; does not directly suggest specific treatment but shapes how causes are understood |
Key Explanatory Models
Psychological disorders result from the interaction of biological factors (genetics, neurochemistry, brain structure), psychological factors (thoughts, emotions, learned behaviors, personality), and social factors (relationships, culture, socioeconomic status, discrimination). No single factor is sufficient; disorders emerge from combinations. The most widely adopted model in contemporary clinical psychology.
Genetic predispositions (diathesis) combine with environmental stressors (stress) to produce psychological disorder. A person with high genetic vulnerability may develop a disorder under moderate stress; a person with low vulnerability may require extreme stressors. Explains why not everyone with a genetic risk factor develops the disorder. Connects biological and environmental perspectives.
A clinical psychologist notes that a client grew up in a family with a history of schizophrenia (biological risk factor) and recently experienced the loss of his job and social network (environmental stressors), after which he began experiencing psychotic symptoms. Which explanatory model best accounts for this pattern?
- (A) The biopsychosocial model, because it emphasizes the interaction of biological, psychological, and social factors in general
- (B) The diathesis-stress model, because a genetic predisposition combined with environmental stressors to trigger the disorder
- (C) The behavioral perspective, because the loss of job and social network were conditioned stimuli for the psychotic response
- (D) The sociocultural perspective, because social inequalities in employment produced the disorder
Selection of Categories of Psychological Disorders
The 2026 CED requires knowledge of selected categories of psychological disorders including their symptoms and possible causes. These represent the major DSM-5 disorder groups most commonly tested on the AP exam.
1. Neurodevelopmental Disorders
| Disorder | Key Symptoms | Possible Causes |
|---|---|---|
| Autism Spectrum Disorder (ASD) | Persistent deficits in social communication and social interaction; restricted, repetitive patterns of behavior, interests, or activities; symptoms present from early childhood; children seek less social and emotional contact, are less likely to make eye contact, and show atypical sensory responses | Strong genetic component; neurological differences in brain connectivity; NOT caused by vaccines (this link has been thoroughly discredited); prenatal factors may contribute |
| ADHD | Persistent pattern of inattention (difficulty sustaining focus, disorganization, forgetfulness) and/or hyperactivity-impulsivity (fidgeting, excessive talking, difficulty waiting) that impairs functioning; diagnosed when symptoms are present before age 12 | Genetic factors; differences in prefrontal cortex development and dopamine regulation; environmental factors (prenatal tobacco exposure) |
2. Schizophrenia Spectrum and Other Psychotic Disorders
Schizophrenia spectrum disorders are characterized by issues in one or more of five areas. Symptoms are classified as positive symptoms (presence of abnormal behavior) or negative symptoms (absence of normal behavior):
| Category | Type | Definition & Example |
|---|---|---|
| Delusions | Positive symptom | False, fixed beliefs not consistent with cultural norms; persecutory delusions: belief that one is being followed or persecuted; grandiose delusions: belief that one has special powers or identity |
| Hallucinations | Positive symptom | False sensory perceptions without real external stimuli; auditory hallucinations (hearing voices) are most common in schizophrenia; can involve any sense |
| Disorganized Thinking/Speech | Positive symptom | Incoherent, fragmented thinking; word salad: stringing together words in nonsensical sequences; loose associations between ideas |
| Disorganized Motor Behavior | Positive symptom or negative | Catatonic excitement (positive: unpredictable agitation) or catatonic stupor (negative: unresponsive immobility, absence of movement) |
| Negative Symptoms | Negative symptom | Absence of normally present behaviors: flat affect (diminished emotional expression), poverty of speech, avolition (reduced goal-directed activity), social withdrawal |
The dopamine hypothesis proposes that schizophrenia involves excess dopamine activity in certain brain pathways (particularly mesolimbic pathways). Evidence: antipsychotic medications that block dopamine D2 receptors reduce positive symptoms; drugs that increase dopamine (e.g., amphetamines) can produce schizophrenia-like symptoms. However, the hypothesis is an oversimplification — negative symptoms may involve dopamine deficits in other pathways, and other neurotransmitters (glutamate) also play roles. Prenatal viral exposure is also a documented risk factor.
3. Depressive Disorders
| Disorder | Diagnostic Core | Key Distinction |
|---|---|---|
| Major Depressive Disorder (MDD) | Five or more of nine symptoms persisting for at least two weeks, including at least one of: (1) depressed mood most of the day nearly every day, or (2) loss of interest or pleasure (anhedonia). Other symptoms: changes in weight/appetite, sleep disturbance, psychomotor changes, fatigue, feelings of worthlessness or guilt, difficulty concentrating, recurrent thoughts of death or suicidality | Most common mood disorder; often called the "common cold" of psychological disorders; single episode or recurrent |
| Persistent Depressive Disorder (PDD) | Depressed mood on most days for at least two years, along with two additional depressive symptoms; less severe than MDD but more chronic | Formerly called dysthymia; lower symptom intensity but longer duration; person may not have two symptom-free weeks in over two years |
4. Bipolar and Related Disorders
| Disorder | Defining Feature | Distinction |
|---|---|---|
| Bipolar I Disorder | At least one manic episode lasting at least 7 days (or requiring hospitalization); manic episodes involve elevated/irritable mood, grandiosity, decreased need for sleep, racing thoughts, increased goal-directed activity, and often impulsive or risky behavior; depressive episodes typically also occur | The presence of a full manic episode distinguishes Bipolar I from Bipolar II; manic episodes may be so severe they require hospitalization |
| Bipolar II Disorder | A pattern of hypomanic episodes (less severe than full mania; not requiring hospitalization) and major depressive episodes; no full manic episodes | Hypomania may be experienced as a productive, energetic state; the depressive episodes cause most of the impairment and treatment-seeking |
5. Anxiety and OCD-Related Disorders
| Disorder | Core Feature | Distinguishing Detail |
|---|---|---|
| Generalized Anxiety Disorder (GAD) | Excessive, difficult-to-control worry about multiple topics (work, health, family, finances) on most days for at least 6 months | Accompanied by physical symptoms: restlessness, fatigue, difficulty concentrating, irritability, muscle tension, sleep disturbance |
| Specific Phobia | Intense, irrational, and persistent fear of a specific object or situation that is disproportionate to actual danger; triggers avoidance behavior | Common types: animals, natural environment, blood-injection-injury, situational, other; avoidance of the feared stimulus is the behavioral core |
| Social Anxiety Disorder | Intense fear of social or performance situations where one might be embarrassed, humiliated, or negatively evaluated by others | Feared social situations are either avoided or endured with intense distress; fear is out of proportion to actual threat |
| Panic Disorder | Recurrent unexpected panic attacks (sudden surges of intense fear with physical symptoms: pounding heart, shortness of breath, dizziness, derealization) plus persistent worry about future attacks | "Fear of fear": the anticipatory anxiety about having another panic attack often causes more distress than the attacks themselves |
| Agoraphobia | Fear or avoidance of situations where escape might be difficult or help unavailable in the event of a panic attack (crowds, public transport, open spaces, being outside home alone) | Often develops following panic attacks; person may become homebound in severe cases |
| Obsessive-Compulsive Disorder (OCD) | Presence of obsessions (persistent, intrusive, unwanted thoughts, urges, or images that cause anxiety) and/or compulsions (repetitive behaviors or mental acts performed to reduce the anxiety from obsessions) | Compulsions are not genuinely pleasurable; they temporarily reduce obsession-related anxiety but are time-consuming and functionally impairing; classified separately from anxiety disorders in DSM-5 |
| Hoarding Disorder | Persistent difficulty discarding or parting with possessions regardless of their actual value, due to perceived need to save items and distress associated with discarding them; results in the accumulation of possessions that clutter and congest living spaces, significantly impairing functioning | Classified in DSM-5 as an OCD-related disorder; hoarding is distinct from collecting (which is organized and not distressing); the hoarding is ego-syntonic (feels right to the person), unlike OCD compulsions which the person recognizes as excessive |
6. Dissociative Disorders
| Disorder | Core Symptom | Note |
|---|---|---|
| Dissociative Identity Disorder (DID) | Presence of two or more distinct personality states (formerly called "multiple personality disorder") that recurrently take control of behavior; often involves gaps in recall of everyday events, personal information, or traumatic experiences | Associated with severe childhood trauma; remains controversial in its etiology; diagnosed when symptoms cause significant distress or functional impairment |
| Dissociative Amnesia | Inability to recall important personal information, usually of a traumatic or stressful nature; the memory loss is too extensive to be explained by ordinary forgetting | May include dissociative fugue: sudden, unexpected travel or confused wandering with amnesia about one's identity or personal history |
7. Trauma- and Stressor-Related Disorders
Post-Traumatic Stress Disorder (PTSD) develops following exposure to a traumatic or stressful event (actual or threatened death, serious injury, sexual violence) either directly, witnessing it, or learning it happened to a close person.
| Symptom Cluster | Examples |
|---|---|
| Re-experiencing (intrusion) | Flashbacks (vivid reliving of the trauma), recurrent nightmares, intrusive memories, intense distress when exposed to trauma reminders |
| Avoidance | Avoiding trauma-related thoughts, feelings, or external reminders (places, people, activities); emotional numbing |
| Negative cognitions and mood | Persistent negative beliefs, distorted blame, persistent negative emotional states, feeling estranged from others |
| Hyperarousal | Sleep disturbance, irritability, hypervigilance, exaggerated startle response, difficulty concentrating |
8. Feeding and Eating Disorders
| Disorder | Core Features | Medical Consequences |
|---|---|---|
| Anorexia Nervosa | Restriction of energy intake leading to significantly low body weight; intense fear of gaining weight or becoming fat; disturbed body image (perceiving oneself as heavier than one actually is); self-worth excessively tied to weight/shape | Malnutrition, electrolyte imbalances, cardiac arrhythmias, bone density loss, hormone disruption; highest mortality rate of any psychiatric disorder |
| Bulimia Nervosa | Recurrent episodes of binge eating (consuming unusually large amounts of food in a discrete period with loss of control) followed by compensatory behaviors to prevent weight gain (purging via vomiting/laxatives, excessive exercise, fasting) | Electrolyte imbalances (dangerous cardiac risk), tooth erosion from stomach acid, esophageal damage; usually maintained around normal weight unlike anorexia |
9. Personality Disorders
Personality disorders involve enduring, inflexible patterns of inner experience and behavior that deviate markedly from cultural expectations, are pervasive and stable, cause distress or functional impairment, and are traceable to adolescence or early adulthood. Organized into three clusters:
| Cluster | General Character | Specific Disorders (with key feature) |
|---|---|---|
| Cluster A — Odd/Eccentric | Appear odd or eccentric; social isolation and unusual thinking | Paranoid: pervasive distrust and suspicion; interprets others' motives as malevolent Schizoid: detachment from social relationships; restricted emotional expression; preference for solitary activities Schizotypal: acute discomfort in close relationships; cognitive or perceptual distortions; eccentric behavior |
| Cluster B — Dramatic/Emotional/Erratic | Appear dramatic, emotional, or unpredictable | Antisocial: disregard for and violation of rights of others; lack of remorse; deceitfulness; impulsivity (formerly "sociopathy/psychopathy") Borderline: instability in relationships, self-image, and affect; chronic emptiness; intense fear of abandonment; impulsivity Histrionic: excessive emotionality and attention-seeking; theatrical, dramatic behavior Narcissistic: grandiosity; need for admiration; lack of empathy; sense of entitlement |
| Cluster C — Anxious/Fearful | Appear anxious or fearful | Avoidant: social inhibition; feelings of inadequacy; hypersensitivity to negative evaluation; avoids social contact despite wanting it Dependent: excessive need to be taken care of; submissive; fears separation; difficulty making decisions independently Obsessive-Compulsive Personality Disorder (OCPD): preoccupation with orderliness, perfectionism, and control at the expense of flexibility and efficiency (distinct from OCD, which involves intrusive obsessions) |
A person experiences recurrent, intrusive thoughts about contamination that cause severe anxiety. To reduce the anxiety, he washes his hands for 30 minutes at a time, dozens of times per day. He knows the washing is excessive but feels unable to stop. He spends so much time washing that he is frequently late for work. This presentation is most consistent with
- (A) Generalized Anxiety Disorder, because the anxiety involves multiple topics including cleanliness and work performance
- (B) Obsessive-Compulsive Disorder, because the intrusive contamination thoughts (obsessions) trigger repetitive hand-washing (compulsions) that cause functional impairment
- (C) Specific Phobia, because he has an irrational fear of contamination that triggers avoidance behavior
- (D) Obsessive-Compulsive Personality Disorder, because he has a preoccupation with cleanliness and perfectionism
❌ OCD ≠ OCPD: OCD involves intrusive, ego-dystonic obsessions and ritualistic compulsions. Obsessive-Compulsive Personality Disorder (OCPD) is a Cluster C personality disorder involving a stable personality style of perfectionism and control — not involving obsessions or compulsions. Two completely different disorders that share a confusing name.
❌ Positive symptoms = presence of abnormal; negative = absence of normal: In schizophrenia, “positive” does not mean good — it means something extra is present (hallucinations, delusions, disorganized speech). “Negative” means something normally present is missing (flat affect, no speech, no movement).
❌ Bipolar I requires a manic episode; Bipolar II does not: The presence of a full manic episode (severe enough to require hospitalization or cause functional impairment) defines Bipolar I. Bipolar II has hypomanic episodes (less severe) plus depressive episodes.
Treatment of Psychological Disorders
Treatment of psychological disorders encompasses a wide range of psychotherapeutic approaches, biomedical interventions, and contextual factors that affect outcomes. Effective treatment is guided by evidence, ethical principles, and cultural sensitivity.
Effectiveness, Evidence-Based Practice, and the Therapeutic Alliance
Meta-analyses consistently show that psychotherapy is significantly more effective than no treatment for most psychological disorders. Different therapeutic modalities (cognitive, behavioral, psychodynamic, humanistic) show roughly comparable average effectiveness across disorders — the "Dodo Bird Verdict." Factors that predict effectiveness across approaches include: therapist competence, client motivation, a strong therapeutic alliance, and appropriate matching of treatment to disorder.
Clinical decision-making that integrates the best available research evidence with clinical expertise and client characteristics and preferences. Evidence-based practice moves beyond anecdotal clinical judgment to identify treatments with demonstrated efficacy in controlled research. APA encourages evidence-based practice as the standard for ethical treatment.
The bond of trust and mutual understanding between therapist and client, who work together constructively to overcome the client's problems. A consistently powerful predictor of therapeutic outcome across all modalities — more predictive than any specific technique. Involves agreement on goals, agreement on tasks, and the quality of the personal bond.
An ongoing process of self-reflection and learning about one's own cultural assumptions and biases, combined with genuine respect for and curiosity about clients' cultural identities. Recognizes that cultural norms influence what behaviors are considered disordered, how symptoms are expressed, what treatment is acceptable, and what therapeutic relationships are appropriate. Essential for equitable, effective treatment across diverse populations.
APA Ethical Principles in Clinical Practice
The American Psychological Association identifies core ethical principles that guide the conduct of psychologists in research and clinical practice:
| Principle | Definition | Clinical Application |
|---|---|---|
| Nonmaleficence | Do no harm; avoid actions that cause harm to clients | Avoid harmful or ineffective treatments; maintain client safety; avoid dual relationships that could harm the client |
| Fidelity | Be trustworthy and keep commitments; maintain professional responsibilities | Maintain confidentiality; keep appointments; be honest about treatment goals and limitations; manage transference appropriately |
| Integrity | Be honest, accurate, and non-deceptive in all professional activities | Accurately represent credentials and treatment effectiveness; avoid deceptive practices; acknowledge limits of knowledge |
| Respect for People’s Rights and Dignity | Protect and uphold the rights of all persons; respect autonomy and dignity | Obtain informed consent; respect client self-determination; protect confidentiality; be sensitive to diversity and avoid discrimination |
Deinstitutionalization: the movement of the mid-20th century to move patients out of large psychiatric hospitals and into community-based mental health services. Motivated by concerns about inhumane conditions in institutions and the availability of psychotropic medications. Led to the closure of many state hospitals but was accompanied by inadequate development of community services, contributing to homelessness and incarceration of people with severe mental illness.
Psychotherapeutic Approaches
| Approach | Core Techniques | Disorders Best Suited For |
|---|---|---|
| Psychodynamic Therapy | Free association (saying whatever comes to mind); dream interpretation (exploring manifest and latent dream content); analysis of transference (when client displaces feelings from past relationships onto the therapist); exploration of defense mechanisms and unconscious conflicts | Personality disorders; depression; relationship difficulties; clients seeking insight into long-standing patterns; less suited for acute crisis intervention |
| Cognitive Therapy / CBT | Cognitive restructuring: identifying and challenging cognitive distortions and irrational beliefs. Beck’s cognitive therapy (depression: negative triad — negative views of self, world, and future). REBT (Ellis: identifying and disputing irrational beliefs). Behavioral experiments to test distorted beliefs | Most anxiety disorders, depression, OCD, PTSD; one of the most extensively evidence-based approaches |
| Dialectical Behavior Therapy (DBT) | Developed by Marsha Linehan; combines CBT techniques with acceptance strategies drawn from mindfulness. Four core skill modules: distress tolerance (coping with crises without making things worse), emotion regulation (understanding and managing intense emotions), interpersonal effectiveness (maintaining relationships while asserting needs), and mindfulness (present-moment awareness without judgment). Emphasizes dialectical balance between acceptance and change | Originally developed for borderline personality disorder; now widely used for self-harm, suicidal behavior, eating disorders, and substance use; one of the few evidence-based treatments for BPD |
| Person-Centered (Humanistic) Therapy | Active/empathic listening: the therapist echoes, restates, and clarifies to create conditions for growth. Unconditional positive regard: complete acceptance without conditions. Genuineness/congruence: therapist authenticity. Creates an environment where clients can reconnect with their authentic self-actualizing tendency | Broad applicability; especially useful for clients seeking self-understanding, self-acceptance, and personal growth; less structured than CBT |
| Behavior Therapy | Systematic desensitization: gradual exposure to feared stimuli paired with relaxation (counterconditioning). Exposure therapy: direct confrontation of feared stimuli (in vivo or imaginal). Token economies: systematic reinforcement for target behaviors in institutional settings. Aversion therapy: pairing an unwanted behavior or stimulus with an unpleasant experience (e.g., nausea-inducing drug paired with alcohol) to create a conditioned aversive response and reduce the behavior. Biofeedback: using real-time physiological monitoring (e.g., muscle tension, heart rate, skin temperature) to help clients learn voluntary control over normally involuntary body processes; trains the client to recognize and modify their own physiological states | Phobias, OCD, PTSD, anxiety disorders; habit disorders; behavior problems in clinical settings; aversion therapy used for substance use and unwanted habits; biofeedback used for stress management, chronic pain, hypertension, and tension headaches |
Group Therapy, Individual Therapy, and Hypnosis
| Format/Technique | Description | Advantages and Limitations |
|---|---|---|
| Individual Therapy | One-on-one sessions between therapist and client; most common format | Allows deep personalized attention; maximum privacy; therapist can tailor every session; may be costly or inaccessible |
| Group Therapy | Therapist leads 6–12 clients with similar issues simultaneously; clients provide mutual support and feedback; process occurs within the group dynamic | More cost-effective; provides social support and reduces isolation; normalizes symptoms (seeing others with similar struggles); clients can practice interpersonal skills in session; less individualized attention |
| Hypnosis | A procedure during which a practitioner suggests that a client experience changes in sensations, perceptions, thoughts, or behavior while in a state of heightened suggestibility; used as an adjunct (supplement) to other therapies. Official CED limitation: hypnosis is not supported as a method for retrieving accurate memories or for age regression — memories produced under hypnosis are highly susceptible to suggestion and are not more accurate than normal recall; using hypnosis to recover memories can produce false memories | Some evidence for pain management, anxiety reduction, and habit control; not a standalone treatment for major disorders; effectiveness varies across individuals; not appropriate for memory recovery or forensic use |
Biomedical Treatments
| Treatment | Mechanism / Description | Used For |
|---|---|---|
| Antidepressants | Medications that increase levels of serotonin, norepinephrine, or dopamine in the brain; include SSRIs (fluoxetine), SNRIs, and older tricyclics and MAOIs; SSRIs are most commonly prescribed due to fewer side effects | Major depressive disorder, anxiety disorders, OCD, PTSD, eating disorders; often combined with psychotherapy for best outcomes |
| Antipsychotics | Medications that block dopamine (and some serotonin) receptors; reduce positive symptoms of schizophrenia (hallucinations, delusions); newer atypical antipsychotics have fewer motor side effects | Schizophrenia spectrum disorders; acute manic episodes in bipolar disorder; severe agitation |
| Anxiolytics | Medications that reduce anxiety symptoms; include benzodiazepines (diazepam, lorazepam) which enhance GABA activity, and non-benzodiazepines (buspirone) | Anxiety disorders, panic disorder; benzodiazepines are fast-acting but carry risk of dependence with long-term use |
| Mood Stabilizers | Medications (lithium, anticonvulsants) that reduce the frequency and severity of manic and depressive episodes in bipolar disorder | Bipolar disorder; lithium requires blood monitoring due to narrow therapeutic window |
| Electroconvulsive Therapy (ECT) | Electrical current passes through the brain, triggering a controlled seizure; administered under general anesthesia; mechanism not fully understood but normalizes neurotransmitter activity | Severe, treatment-resistant depression; especially valuable when rapid response is needed (acute suicidality) or antidepressants have failed; common side effect: short-term memory impairment |
| Transcranial Magnetic Stimulation (TMS) | A coil placed near the head delivers magnetic pulses that stimulate or inhibit specific brain regions (typically the prefrontal cortex); non-invasive; does not require anesthesia | Treatment-resistant depression; FDA-approved; fewer side effects than ECT; typically requires multiple sessions |
| Psychosurgery / Lesioning | Surgical destruction of brain tissue to alter behavior or mental processes. Historical example: prefrontal lobotomy (severing connections between prefrontal cortex and deeper brain structures, used in the mid-20th century to treat severe mental illness; largely discontinued due to severe side effects and loss of personality). Modern surgical lesioning targets highly specific brain regions with much greater precision for treatment-resistant conditions | Rarely used today; reserved for severe, treatment-resistant cases (e.g., OCD, certain movement disorders) when all other treatments have failed; highlights the importance of irreversible vs. reversible interventions |
| Tardive Dyskinesia | A potential long-term side effect of extended antipsychotic medication use; characterized by involuntary, repetitive movements of the face, tongue, lips, and extremities (grimacing, tongue protrusion, lip smacking, finger movements). Results from prolonged blockade of dopamine D2 receptors, which leads to receptor supersensitivity | Illustrates the importance of monitoring psychoactive medication side effects over time; risk is higher with older (typical) antipsychotics; may be irreversible in some cases; reinforces that psychotropic medications require careful clinical management |
A therapist works with a client who has a severe spider phobia. The therapist first teaches the client deep relaxation techniques, then has the client imagine progressively more anxiety-provoking scenes involving spiders (looking at a picture of a spider, then a spider in a glass tank, then eventually holding a spider) while maintaining relaxation throughout. This treatment approach is called
- (A) cognitive restructuring, because the therapist is helping the client change their thought patterns about spiders
- (B) transference analysis, because the client is transferring fears from an early childhood experience onto spiders
- (C) systematic desensitization, because the therapist pairs gradual exposure to the feared stimulus with a relaxation response to weaken the conditioned fear
- (D) psychodynamic therapy, because the therapist is exploring unconscious associations the client has with spiders
❌ ECT is not barbaric or uncontrolled: Modern ECT is administered under general anesthesia and is a legitimate, evidence-based treatment for severe treatment-resistant depression. It is not the same as the historical portrayal in older media. The main concern is temporary memory impairment, not harm from the seizure itself.
❌ Systematic desensitization vs. flooding: Systematic desensitization uses gradual exposure paired with relaxation. Flooding/implosion uses immediate maximal exposure to the feared stimulus until fear extinguishes. Both are behavioral; the key difference is the pace and the role of relaxation.
❌ Free association belongs in psychodynamic, not CBT: Free association (saying whatever comes to mind) and dream interpretation are psychodynamic techniques. CBT uses thought records, behavioral experiments, and Socratic questioning to identify and challenge cognitive distortions.
Practice Questions
Unit 5 Progress Check: 1 AAQ + 1 EBQ. Unit 5 is 15–25% of the exam and often features clinical vignettes requiring disorder identification, causal explanation using multiple perspectives, and treatment selection. Unit 5 frequently assesses ethics-related skill 2.D in source-based written questions.
A 23-year-old man has been hearing voices telling him he is a prophet, believes he is being monitored by a government agency, and has been speaking in disconnected, incoherent sentences for the past six months. He no longer tends to personal hygiene and rarely speaks spontaneously. Which features represent positive symptoms of schizophrenia?
- (A) Loss of personal hygiene and reduced spontaneous speech
- (B) Hearing voices, persecutory delusions, and disorganized speech
- (C) Reduced personal care and the belief that he is being monitored
- (D) Social withdrawal and flat affect
A construction worker loses his job unexpectedly after 15 years with the company. He has a family history of depression (biological predisposition). Within three months of the job loss, he develops severe depressive symptoms. His identical twin, who also carries the genetic predisposition, does not develop depression despite a similar lifestyle. Which concept most directly explains why one twin developed depression and the other did not?
- (A) The biopsychosocial model, because multiple factors interact to produce depression in complex ways
- (B) The eclectic approach, because different psychological perspectives account for different aspects of depression
- (C) The diathesis-stress model, because the same genetic predisposition combined with a specific environmental stressor (job loss) to produce disorder in one twin but not the other
- (D) The adaptation-level phenomenon, because the worker had adapted to high-stress employment and the loss disrupted his equilibrium
Researchers recruited 120 first-year medical students and randomly assigned them to two conditions (n=60 each). In the intervention condition, students participated in an 8-week mindfulness-based stress reduction (MBSR) program (weekly 2-hour sessions plus daily 30-minute home practice). In the control condition, students received standard medical school orientation with no additional intervention. Salivary cortisol was measured at the start and end of the 8-week period. Measures of self-reported stress, anxiety, and subjective well-being were collected at baseline, post-intervention, and 6-month follow-up. Results: MBSR participants showed significantly larger decreases in cortisol levels, self-reported stress, and anxiety scores, and significantly larger increases in subjective well-being compared to controls (all p < .001). At the 6-month follow-up, well-being benefits were maintained in the MBSR group. Prior to participation, all students provided written informed consent and were told they could withdraw at any time. No deception was used. The study was approved by the university IRB.
(a) Identify the research method and explain why this design supports a causal conclusion about MBSR and stress outcomes.
(b) Identify the independent variable and ONE dependent variable measured in this study.
(c) Using your knowledge of health psychology, explain the physiological pathway through which reduced stress might lead to lower cortisol levels, and describe one health benefit of reduced cortisol over time.
(d) Identify one ethical guideline described in the study. Describe one way the researchers applied this ethical guideline.
(b) Independent variable: Whether the participant was assigned to the MBSR intervention or the control condition.
One dependent variable: Salivary cortisol level measured at baseline and post-intervention. (Alternative: self-reported stress score, self-reported anxiety score, or subjective well-being score.)
(c) Physiological pathway: Mindfulness practice reduces activation of the sympathetic nervous system and the hypothalamic-pituitary-adrenal (HPA) axis. When the HPA axis is less activated, the adrenal cortex secretes less cortisol. This is why stressed individuals have elevated cortisol, and why stress-reduction interventions lower it. Over time, reduced cortisol levels benefit health through improved immune function: chronically elevated cortisol suppresses lymphocyte production and antibody response; when cortisol normalizes, these immune functions recover. Additionally, reduced chronic cortisol lowers cardiovascular risk (lower blood pressure, reduced arterial inflammation) and reduces the risk of immune suppression-related illnesses (connecting to the GAS exhaustion phase).
(d) Ethical guideline: Informed consent — participants have the right to voluntarily agree to participate in research with knowledge of the study's nature before it begins.
Application: All students provided written informed consent before the study began, and were explicitly told they could withdraw at any time without consequence. This ensured that participation was both informed (they understood they were in a research study) and voluntarily chosen (no coercion to continue if they wished to stop).
Source 1: A meta-analysis of 89 randomized controlled trials compared cognitive-behavioral therapy (CBT) to control conditions for anxiety disorders. CBT showed a large average effect size (d = 0.81) compared to waitlist controls and a medium effect size (d = 0.45) compared to active controls. Benefits were maintained at follow-up assessments averaging 13 months post-treatment. Effect sizes were largest for specific phobias (d = 1.06) and social anxiety disorder (d = 0.86), and smallest for GAD (d = 0.51).
Source 2: A longitudinal study followed 200 college students through their first year of school. Students with pessimistic explanatory styles at the beginning of the year showed significantly higher rates of depression diagnosis by the end of the year (28%) compared to students with optimistic explanatory styles (8%), even after controlling for baseline depression levels, academic stress, and social support. The association remained significant after controlling for all covariates (OR = 3.1, p < .01).
Source 3: A twin study of 1,000 identical and 1,000 fraternal twin pairs assessed for PTSD symptoms following documented trauma exposure. Heritability estimates for PTSD symptoms were approximately 37%, indicating that roughly one-third of the variance in PTSD symptom severity is attributable to genetic factors. The remaining variance was accounted for by non-shared environmental factors. Shared environmental factors (family environment) accounted for minimal variance in symptom severity.
Using evidence from at least two of the three sources, make a claim about the causes and/or treatment of psychological disorders. Provide two pieces of evidence and apply AP Psychology reasoning.
Evidence 1 (Source 2): Students with pessimistic explanatory styles at the beginning of the year were over three times more likely to develop depression by year's end than those with optimistic explanatory styles (OR = 3.1), even after controlling for baseline depression, stress, and social support. This demonstrates that psychological factors — specifically, how people habitually attribute the causes of negative events — independently contribute to depression risk. The pessimistic explanatory style (attributing bad events to internal, stable, global causes) appears to be a meaningful psychological risk factor beyond social and situational determinants.
Evidence 2 (Source 1): CBT produced large effect sizes for anxiety disorders (d = 0.81 vs. waitlist), with benefits maintained over 13 months on average. This demonstrates that targeting cognitive distortions and maladaptive behavioral patterns through systematic psychotherapy produces durable symptom reduction in anxiety disorders. The variation in effect sizes across disorders (phobias d = 1.06 vs. GAD d = 0.51) suggests that the degree to which a disorder is maintained by identifiable cognitive and behavioral patterns predicts how well CBT works.
AP Psychology Reasoning: Together, Sources 2 and 1 reflect the interacting roles of psychological factors in both the etiology and treatment of psychological disorders. Source 2 demonstrates that cognitive patterns (explanatory style) function as a risk factor for depression — consistent with the cognitive perspective's emphasis on dysfunctional thinking as a cause of disorder. Source 1 demonstrates that systematically identifying and changing these cognitive patterns through CBT produces large, durable symptom reductions — consistent with the cognitive perspective's treatment implications. Source 3 adds an important qualifier: a significant portion of PTSD symptom variation (37%) is heritable, consistent with the diathesis-stress model. This means cognitive interventions work best as treatments for the psychological component of disorders that also have genetic components. Effective clinical practice should therefore follow the biopsychosocial model — acknowledging biological predispositions while actively targeting the psychological mechanisms (explanatory style, cognitive distortions, behavioral avoidance) that can be modified through evidence-based interventions like CBT.
High-Frequency Common Mistakes — Unit 5
- ⚡GAS exhaustion phase = greatest illness susceptibility, NOT alarm phaseThe alarm phase activates the sympathetic nervous system and prepares the body for action (fight/flight/freeze). It does NOT suppress immunity. The exhaustion phase (prolonged, unresolved stress) depletes bodily resources and suppresses immune function, making the person most vulnerable to illness.
- 🔧Diathesis-stress ≠ biopsychosocial — they explain different thingsDiathesis-stress: genetic predisposition + environmental stressor → disorder; explains why same genes produce different outcomes. Biopsychosocial: biological + psychological + social factors all contribute; describes the full set of factors without specifically predicting the genetic-trigger interaction. Both are testable on AP exam.
- 🔴Positive symptoms = presence of abnormal; negative = absence of normalIn schizophrenia, "positive" does not mean good. Positive symptoms ADD something abnormal (hallucinations, delusions, disorganized speech). Negative symptoms REMOVE something normal (flat affect, alogia, avolition). Both can coexist in the same person.
- 📚OCD ≠ OCPD — different diagnoses, different clustersOCD: intrusive obsessions + ego-dystonic compulsions to reduce anxiety; classified with obsessive-compulsive and related disorders. OCPD: stable personality style of perfectionism and control; Cluster C personality disorder. Similar names, completely different disorders. OCPD does not involve true obsessions or compulsions.
- 🍌Bipolar I requires full manic episode; Bipolar II has hypomania, not maniaBipolar I: at least one manic episode lasting ≥7 days, severe enough to cause major impairment or require hospitalization. Bipolar II: hypomanic episodes (not full mania; no hospitalization required) + depressive episodes. Bipolar II is not a milder form of Bipolar I — the depressive episodes cause most of the suffering.
- 🧠Eclectic approach = most psychologists use multiple perspectivesMost clinicians do not rigidly adhere to one theoretical orientation. An eclectic approach draws on the most appropriate techniques from multiple perspectives depending on the client, disorder, and presenting issues. This is the dominant approach in contemporary clinical practice.
- 📄ECT is a legitimate evidence-based treatment for severe depressionModern ECT is administered under general anesthesia, targets treatment-resistant severe depression, and is approved by medical authorities as safe and effective. The main concern is temporary memory impairment. It is not dangerous or punitive as portrayed in some historical media.
- 🤓Cultural humility ≠ cultural competence: it is an ongoing processCultural humility is not a fixed endpoint of "knowing about cultures" — it is a continuous process of self-reflection about one's own cultural biases and genuine openness to clients' cultural frameworks. Diagnosis and treatment must always account for cultural context.
- 💥Anorexia nervosa has the highest mortality rate of any psychiatric disorderAnorexia is not merely "dieting gone too far" — it has severe medical consequences (cardiac arrhythmia, electrolyte imbalances, bone density loss) and the highest mortality rate among psychiatric disorders. Bulimia, while also medically serious, is typically maintained at normal body weight.
- 🌟Posttraumatic growth ≠ absence of PTSD — they can coexistPTG is the positive psychological development that some people report following trauma (increased personal strength, new possibilities, deeper relationships). It does not mean the trauma was good, nor does it require the absence of PTSD. A person can experience both PTSD symptoms and PTG simultaneously.
Unit 5 is 15–25% of the exam and generates many clinical vignette MCQs requiring disorder identification and treatment selection. Highest-yield: GAS three phases (exhaustion = illness susceptibility), diathesis-stress model (genetic vulnerability + environmental trigger), biopsychosocial model, official three criteria for psychological disorder (dysfunction/distress/deviation from social norm), seven perspectives including evolutionary, all disorder categories with distinguishing features, positive vs. negative symptoms in schizophrenia, Bipolar I vs. II (full mania vs. hypomania), OCD vs. OCPD vs. hoarding disorder, systematic desensitization, aversion therapy, biofeedback, DBT four modules, CBT, hypnosis NOT for accurate memory retrieval, APA four ethical principles, ECT for severe depression, tardive dyskinesia as antipsychotic side effect, tend-and-befriend response, posttraumatic growth, and six virtues in positive psychology. Unit 5 frequently assesses ethics-related skill 2.D in source-based written questions.