AP Psychology: Everything You Need To Know! (Units 0-5 Summarized)

This section introduces the AP Psychology review, emphasizing the importance of understanding key concepts for the AP exam. It quickly covers the seven psychological perspectives, experimental and non-experimental research methods (including independent/dependent variables, confounding variables, random assignment, placebo effect, single/double blind studies, operational definitions, and correlational research), sampling techniques (random vs. convenience sampling, sampling bias), ethical guidelines (IRB, informed consent, debriefing, confidentiality), and basic statistical concepts (measures of central tendency, variation, normal/skewed distributions, percentile rank, effect size, statistical significance). It concludes with argumentation skills for FRQs.

Unit 1 delves into the biological foundations of behavior. It starts with the nature vs. nurture debate and the evolutionary perspective. The nervous system is broken down into the CNS and PNS, with further subdivisions into somatic and autonomic nervous systems (sympathetic/parasympathetic). The structure and function of neurons, types of neurons (sensory, motor, interneurons), neural transmission (all-or-none principle, depolarization, resting potential, threshold, re-uptake, neurotransmitters, hormones, psychoactive drugs), and brain structures (brain stem, cerebellum, limbic system, cerebral cortex, lobes, split-brain research, Broca's/Wernicke's areas, plasticity, brain imaging) are reviewed. The section concludes with an overview of sleep (consciousness, circadian rhythm, sleep stages, REM sleep, dream theories, sleep disorders) and sensation (absolute/difference thresholds, Weber-Fechner law, sensory adaptation, sensory interaction, synesthesia, visual and auditory systems, chemical senses, touch/pain, vestibular/kinesthetic senses).

Unit 2 focuses on cognition, starting with perception (bottom-up/top-down processing, schemas, perceptual sets, Gestalt principles, attention, inattentional/change blindness, depth cues, perceptual consistencies, apparent movement). It then moves to thinking and problem-solving, covering concepts, prototypes, problem-solving strategies (algorithms, heuristics - representativeness/availability), decision-making biases (mental set, priming, framing, functional fixedness, gambler's fallacy, sunk cost fallacy), and thinking styles (divergent/convergent). A significant portion is dedicated to memory: types of memory (explicit/implicit, episodic/semantic, procedural/prospective), biological aspects (long-term potentiation, parallel processing), memory models (working memory, multi-store, levels of processing), encoding strategies (mnemonic devices, chunking, spacing effect, testing effect, serial position effect), memory storage (sensory, short-term, working, long-term, rehearsal, hippocampus, autobiographical memories, amnesia), and retrieval (recall, recognition, context-dependent/mood-congruent/state-dependent memory, retrieval practices). Finally, reasons for forgetting are discussed (decay, interference, tip-of-the-tongue, repression, misinformation effect, constructive memory).

This part covers intelligence and achievement, defining intelligence and discussing fluid vs. crystallized intelligence. It explains IQ scores, psychometric principles (standardization, validity, reliability), stereotype threat/lift, the Flynn effect, and the socio-cultural biases in testing. Achievement and aptitude tests, and fixed vs. growth mindsets are also covered. Then, it transitions into Unit 3: Development and Learning. Developmental research methods (cross-sectional, longitudinal), physical development (prenatal influences, motor skills, reflexes, visual cliff, critical/sensitive periods, imprinting, adolescence, adulthood), gender and sexual orientation, and cognitive development (Piaget's stages, Vygotsky's theory - scaffolding, ZPD, cognitive changes in adulthood, language development) are reviewed.

This section continues Unit 3, focusing on social and emotional development: Bronfenbrenner's ecological systems theory, parenting styles (authoritarian, authoritative, permissive), attachment styles (secure, insecure), temperament, separation anxiety, Harlow's monkey studies, adolescent egocentrism (imaginary audience, personal fable), the social clock, and adverse childhood experiences. Erikson's stages of psychosocial development and identity development (achievement, diffusion, foreclosure, moratorium) are also highlighted. The learning segment reviews classical conditioning (UCS, UCR, CS, CR, acquisition, extinction, spontaneous recovery, generalization, discrimination, higher-order conditioning, counterconditioning, taste aversions, biological preparedness) and operant conditioning (Law of Effect, positive/negative reinforcement, positive/negative punishment, primary/secondary reinforcers, shaping, instinctive drift, superstitious behavior, learned helplessness, reinforcement schedules). The section concludes with social, cognitive, and neurological factors in learning (social learning theory, observational learning, vicarious reinforcement, insight learning, latent learning, cognitive maps).

Unit 4 covers social psychology and personality. It begins with attributions (dispositional/situational, attribution theory, explanatory style) and common biases (fundamental attribution error, self-serving bias). Locus of control, person perception (mere exposure effect, self-fulfilling prophecy, social comparison, relative deprivation), and attitudes (stereotypes, prejudice, discrimination, in-group/out-group, implicit attitudes, just-world phenomenon, outgroup homogeneity bias, in-group bias, ethnocentrism) are discussed. Attitude change mechanisms like belief perseverance, confirmation bias, and cognitive dissonance are explained. Social situations explore social norms, social influence theory (normative/informational), and persuasion (elaboration likelihood model, central/peripheral routes, halo effect, foot-in-the-door, door-in-the-face). Group influences (social facilitation/loafing, deindividuation, group polarization/think, bystander effect), altruism, and industrial-organizational psychology are also covered. Finally, personality theories are introduced: psychodynamic (unconscious, ego/id/superego, defense mechanisms, projective tests), humanistic (unconditional regard, self-actualizing tendency, self-concept, self-efficacy, self-esteem), and social-cognitive theory (reciprocal determinism). Trait theories (Big Five) and personality inventories are also briefly touched upon.

This part of Unit 4 focuses on motivation and emotion. Motivation theories include drive reduction theory (homeostasis), arousal theory (Jukes and Dodson law), self-determination theory (intrinsic/extrinsic motivation), incentive theory, instinct theory, Lewin's motivational conflicts (approach-approach, approach-avoidance, avoidance-avoidance), and sensation-seeking theory. The application of motivation to eating (hunger, hormones like ghrelin/leptin, external factors) is also discussed. Emotion is then covered, defining affect and exploring early psychological theories on the relationship between physiological and cognitive experiences. Key concepts like the facial feedback hypothesis and the broaden-and-build theory are introduced. Universal emotional expressions, display rules, and elicitors for emotional expression are also mentioned.

Unit 5, the final unit, begins with health psychology and stress. It differentiates eustress and distress, links stress to health issues, and discusses stressors (traumatic events, daily hassles, ACEs). Selye's General Adaptation Syndrome (GAS) with its alarm, resistance, and exhaustion phases, and the tend-and-befriend theory are explained. Coping mechanisms (problem-focused, emotion-focused) and positive psychology concepts (well-being, resilience, positive emotions, gratitude, signature strengths, post-traumatic growth) are presented. The unit then delves into psychological disorders: defining/classifying them (dysfunction, distress, deviation from norms, DSM/ICD), consequences of diagnosis, and explanatory perspectives (biopsychosocial model, diathesis-stress model). Specific disorder categories are reviewed: neurodevelopmental (ADHD, ASD), schizophrenic spectrum (positive/negative symptoms, delusions, hallucinations, disorganized speech/motor behavior, catatonia, dopamine hypothesis), depressive (MDD, PDD), bipolar (bipolar I/II, cycling), anxiety (specific phobias, agoraphobia, panic disorder, social anxiety disorder, generalized anxiety disorder, culture-bound disorders), obsessive-compulsive and related (OCD, hoarding disorder), dissociative (dissociative amnesia with/without fugue, dissociative identity disorder), trauma and stressor-related (PTSD), feeding and eating (anorexia nervosa, bulimia nervosa), and personality disorders (Clusters A, B, C).

The final part of Unit 5 focuses on treatment. Psychotherapy and evidence-based interventions are highlighted, emphasizing cultural humility and therapeutic alliance. The shift towards deinstitutionalization and combined medication/psychosocial therapies is noted. Ethical principles established by the APA are mentioned. Different therapeutic techniques are outlined: psychodynamic (free association, dream interpretation), cognitive (cognitive restructuring, fear hierarchies, cognitive triad), applied behavior analysis (exposure therapies, systematic desensitization, aversion therapies, token economies, biofeedback), cognitive-behavioral (DBT, REBT), and humanistic (person-centered therapy, active listening, unconditional positive regard). Additional topics include hypnosis, biological interventions (psychoactive medications, their interaction with neurotransmitters, side effects like tardive dyskinesia, and types like antidepressants, anxiolytics, lithium, antipsychotics), and non-invasive/surgical interventions (psychosurgery, lesioning, TMS, ECT, lobotomy). The video concludes with encouragement for the AP exam.