AP Psychology Topic 5.4 covers a set list of psychological disorders organized into categories: neurodevelopmental, schizophrenic spectrum, depressive, bipolar, anxiety, obsessive-compulsive and related, dissociative, trauma and stressor-related, feeding and eating, and personality disorders. For each category you need to describe the main symptoms and the possible causes (biological, genetic, environmental, behavioral, cognitive, social, or cultural). Only the disorders named in this topic are tested, so focus your studying there.

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AP Psych 5.4 Disorder Categories

AP Psych 5.4 focuses on selected categories of psychological disorders, not every disorder in a diagnostic manual. You need to recognize the named disorders, connect symptoms to the correct category, and explain possible causes using biological, genetic, environmental, behavioral, cognitive, social, or cultural factors.

For the exam, study the official categories: neurodevelopmental, schizophrenic spectrum, depressive, bipolar, anxiety, obsessive-compulsive and related, dissociative, trauma and stressor-related, feeding and eating, and personality disorders.

Why This Matters for the AP Psychology Exam

This topic is a major source of multiple-choice questions in Unit 5, which carries some of the heaviest weight on the exam. You will often need to match a described set of symptoms to the correct disorder, or connect a disorder to a likely cause or psychological perspective. The skill of applying perspectives and concepts to real scenarios shows up across the exam, including on free-response questions where you support claims with psychological reasoning.

Keep in mind the official limit here: only the disorders listed in this topic are in scope. You do not need to memorize the full diagnostic manual. Knowing the representative disorders well is more useful than skimming many extra conditions.

Key Takeaways

Each disorder category has signature symptoms you should be able to recognize from a short scenario.
Possible causes usually pull from the same toolbox: biological, genetic, environmental, behavioral, cognitive, social, and cultural factors.
Positive symptoms add something unusual (delusions, hallucinations); negative symptoms take away typical behavior (flat affect, catatonic stupor).
Some anxiety disorders have culture-bound forms you should know: ataque de nervios (panic) and taijin kyofusho (social anxiety).
Personality disorders sort into three clusters: A (odd/eccentric), B (dramatic/erratic), and C (anxious/fearful).
Only the disorders named in this topic are tested, so prioritize those over extra conditions.

The Categories and Their Selected Disorders

Exclusion note: While diagnostic manuals list many disorders, the AP Psychology Exam focuses on the disorders listed in this topic as representative of an introductory understanding of psychological disorders.

Neurodevelopmental Disorders

These appear during the developmental period (early in life) and are judged against whether behavior fits a person's age or maturity range. The two in scope are:

ADHD (attention-deficit/hyperactivity disorder): trouble maintaining attention, hyperactivity, and impulsive actions.
Autism spectrum disorder (ASD): social communication challenges, restricted interests, and repetitive behaviors.

Possible causes: environmental, physiological, or genetic factors.

Schizophrenic Spectrum Disorders

Defined by issues in one or more of five areas: delusions, hallucinations, disorganized thinking or speech, disorganized motor behavior, and negative symptoms. Schizophrenia can be acute (short-term and severe) or chronic (long-lasting).

Delusions (false beliefs, a positive symptom): includes delusions of persecution (others want to harm you) and delusions of grandeur (special powers or importance).
Hallucinations (false perceptions, a positive symptom): can involve any sense; auditory hallucinations are common.
Disorganized thinking or speech (a positive symptom): may show up as word salad, stringing words together in nonsensical ways.
Disorganized motor behavior: may appear as catatonia. Catatonic excitement is a positive symptom; catatonic stupor is a negative symptom.
Negative symptoms: the absence of typical behavior, such as flat affect (little emotional expression) or catatonic stupor.

Possible causes: genetic or biological links, including prenatal virus exposure and neurotransmitter imbalances (the dopamine hypothesis).

Depressive Disorders

Marked by sad, empty, or irritable mood plus physical and cognitive changes that affect functioning. The two in scope are:

Major depressive disorder: persistent sadness or hopelessness, loss of interest or pleasure (anhedonia), appetite or sleep changes, fatigue, trouble concentrating, feelings of worthlessness, and thoughts of death.
Persistent depressive disorder (dysthymia): a chronic, often less severe form of depression that lasts a long time.

Possible causes: biological, genetic, social, cultural, behavioral, or cognitive sources. A common cognitive example is Aaron Beck's cognitive triad (negative thoughts about oneself, the world, and the future).

Bipolar Disorders

Defined by periods of mania and periods of depression that alternate over varying lengths of time. The two in scope are:

Bipolar I disorder: at least one manic episode, which may come before or after depressive episodes. Mania can include elevated or irritable mood, increased energy, decreased need for sleep, racing thoughts, grandiosity, and risky behavior.
Bipolar II disorder: at least one hypomanic episode (a milder form of mania) plus at least one major depressive episode.

Possible causes: biological, genetic, social, cultural, behavioral, or cognitive sources.

Anxiety Disorders

Marked by excessive fear and/or anxiety with related disturbances to behavior. The disorders in scope are:

Specific phobia: fear of a specific object or situation, such as acrophobia (heights) or arachnophobia (spiders).
Agoraphobia: intense fear of situations like public transportation, open or enclosed spaces, standing in line or crowds, or being outside the home alone. The fear centers on the situation itself.
Panic disorder: repeated panic attacks (unanticipated, overwhelming fear with biological, cognitive, and emotional symptoms). A culture-bound form is ataque de nervios, experienced mainly by people of Caribbean or Iberian descent.
Social anxiety disorder: intense fear of being judged or watched by others. It is distinct from agoraphobia but may overlap. A culture-bound form is taijin kyofusho, experienced mainly by Japanese people, in which a person fears that others find their body undesirable or offensive.
Generalized anxiety disorder (GAD): prolonged, nonspecific anxiety or worry.

Possible causes: learned associations between stimuli, maladaptive thinking or emotional responses, and biological or genetic sources.

Defined by obsessions (intrusive thoughts) and compulsions (repetitive behaviors meant to address the obsessions). The two in scope are:

Obsessive-compulsive disorder (OCD): obsessions and compulsions that take up time and cause distress or impairment.
Hoarding disorder: persistent difficulty discarding possessions, leading to clutter and distress.

Possible causes: learned associations between stimuli, maladaptive thinking or emotional responses, and biological or genetic sources.

Dissociative Disorders

Defined by dissociations from consciousness, memory, identity, emotion, perception, body representation, motor control, or behavior. The disorders in scope are:

Dissociative amnesia (with and without fugue): inability to recall important personal information, often tied to a stressful or traumatic event. The fugue form adds unexpected travel or wandering and confusion about identity.
Dissociative identity disorder: two or more distinct identity states.

Possible causes: the experience of trauma or stress.

Defined by exposure to a traumatic or stressful event followed by psychological distress. The disorder in scope is posttraumatic stress disorder (PTSD). Symptoms may include hypervigilance, severe anxiety, flashbacks, insomnia, emotional detachment, and hostility.

Possible causes: the experience of trauma or stress.

Feeding and Eating Disorders

Defined by altered consumption or absorption of food that harms health or psychological functioning. The two in scope are:

Anorexia nervosa: restriction of food intake, intense fear of gaining weight, and distorted body image, often with very low body weight.
Bulimia nervosa: cycles of binge eating followed by compensatory behaviors (such as vomiting or excessive exercise) to prevent weight gain.

Possible causes: biological, genetic, social, cultural, behavioral, or cognitive sources.

Personality Disorders

Enduring patterns of inner experience and behavior that deviate from one's culture, are pervasive and inflexible, begin in adolescence or early adulthood, stay stable over time, and lead to distress or impairment. They sort into three clusters:

Cluster A (odd or eccentric): paranoid, schizoid, and schizotypal personality disorders.
Cluster B (dramatic, emotional, or erratic): antisocial, histrionic, narcissistic, and borderline personality disorders.
Cluster C (anxious or fearful): avoidant, dependent, and obsessive-compulsive personality disorders.

Possible causes: biological, genetic, social, cultural, behavioral, or cognitive sources.

How to Use This on the AP Psychology Exam

MCQ

Read the scenario for signature symptoms first, then match to the disorder. For example, word salad and delusions of grandeur point to schizophrenic spectrum, while panic attacks that come out of nowhere point to panic disorder.
Watch for positive versus negative symptoms in schizophrenia questions. Flat affect and catatonic stupor are negative; hallucinations and catatonic excitement are positive.
Distinguish look-alike disorders. Agoraphobia centers on the situation; social anxiety centers on being judged. Bipolar I requires a full manic episode; Bipolar II uses hypomania plus major depression.
Connect culture-bound forms to their categories: ataque de nervios with panic disorder, taijin kyofusho with social anxiety disorder.

Free Response

When a prompt asks you to apply a concept, name the disorder and tie it to a specific symptom or cause rather than describing it in general terms.
Use cause language that matches the category. Dissociative, trauma, and stressor-related disorders link to trauma or stress, while many others draw on a mix of biological, genetic, social, cultural, behavioral, or cognitive sources.
If you mention a perspective (biological, cognitive, behavioral, and so on), make the connection explicit, such as linking OCD compulsions to negative reinforcement under the behavioral perspective.

Common Trap

Do not assume every fear-based disorder is the same. Specific phobia, agoraphobia, social anxiety, panic disorder, and GAD each have a distinct focus.
Do not confuse obsessive-compulsive disorder with obsessive-compulsive personality disorder. OCD involves obsessions and compulsions; the personality disorder is a stable Cluster C pattern.

Common Misconceptions

"Positive symptoms are good and negative symptoms are bad." Positive means added behavior (like hallucinations), and negative means a loss of typical behavior (like flat affect). Neither term means good or bad.
"Bipolar disorder is just quick mood swings." Bipolar disorders involve distinct periods of mania (or hypomania) and depression, not minute-to-minute changes.
"Dissociative identity disorder is the same as schizophrenia." They are different. DID involves distinct identity states; schizophrenia involves symptoms like delusions, hallucinations, and disorganized thinking.
"Everyone who is neat or likes order has OCD." OCD involves intrusive obsessions and compulsions that cause real distress or impairment, not simply a preference for tidiness.
"You should memorize every disorder in the diagnostic manual." Only the disorders named in this topic are in scope for the exam, so focus there.
"Agoraphobia just means fear of open spaces." It covers a range of situations, including crowds, enclosed spaces, public transportation, and being away from home, where escape or help might feel hard to get.

Vocabulary

The following words are mentioned explicitly in the College Board Course and Exam Description for this topic.

Term	Definition
acrophobia	A specific phobia characterized by fear of heights.
acute	A sudden onset or short-term manifestation of a condition, as opposed to chronic.
agoraphobia	An anxiety disorder involving intense fear of specific social situations such as public transportation, open spaces, enclosed spaces, crowds, or being outside the home alone.
anorexia nervosa	An eating disorder characterized by severe restriction of food intake and an intense fear of gaining weight, leading to significantly low body weight.
antisocial personality disorder	A Cluster B personality disorder characterized by disregard for the rights of others and lack of remorse for harmful actions.
anxiety disorders	A category of psychological disorders characterized by excessive fear and/or anxiety with related disturbances to behavior.
arachnophobia	A specific phobia characterized by fear of spiders.
ataque de nervios	A culture-bound anxiety disorder experienced mainly by people of Caribbean or Iberian descent, manifesting as panic attacks.
attention-deficit/hyperactivity disorder (ADHD)	A neurodevelopmental disorder characterized by persistent patterns of inattention and/or hyperactivity-impulsivity that interfere with functioning or development.
autism spectrum disorder (ASD)	A neurodevelopmental disorder characterized by persistent difficulties in social communication and interaction, along with restricted and repetitive patterns of behavior, interests, or activities.
avoidant personality disorder	A Cluster C personality disorder characterized by social inhibition, feelings of inadequacy, and hypersensitivity to rejection.
biological sources	Physical or physiological factors, such as brain chemistry or neural functioning, that may contribute to the development of obsessive-compulsive disorders.
bipolar cycling	The alternating pattern of experiencing periods of depression and mania in bipolar disorders, which can vary in duration and frequency.
bipolar disorders	Mental health conditions characterized by alternating periods of mania and depression that can significantly impact mood, energy, and functioning.
Bipolar I disorder	A bipolar disorder characterized by at least one manic episode, often accompanied by depressive episodes.
Bipolar II disorder	A bipolar disorder characterized by hypomanic episodes and depressive episodes, but without full manic episodes.
borderline personality disorder	A Cluster B personality disorder characterized by unstable relationships, intense fear of abandonment, and emotional instability.
bulimia nervosa	An eating disorder characterized by cycles of binge eating followed by compensatory behaviors such as purging, fasting, or excessive exercise.
catatonia	A state of disordered movement that may be experienced as excitement (a positive symptom) or stupor (a negative symptom manifestation).
catatonic stupor	A negative symptom manifestation of catatonia characterized by a lack of movement or responsiveness.
chronic	A long-term or persistent manifestation of a condition that develops gradually over time.
Cluster A	The odd or eccentric cluster of personality disorders, including paranoid, schizoid, and schizotypal personality disorders.
Cluster B	The dramatic, emotional, or erratic cluster of personality disorders, including antisocial, histrionic, narcissistic, and borderline personality disorders.
Cluster C	The anxious or fearful cluster of personality disorders, including avoidant, dependent, and obsessive-compulsive personality disorders.
cognitive changes	Mental or thinking-related symptoms in depressive disorders, such as difficulty concentrating, negative thoughts, or impaired decision-making.
compulsions	Intrusive, often repetitive behaviors or mental acts performed in response to obsessions, typically intended to reduce anxiety or prevent a feared outcome.
culture-bound anxiety disorder	An anxiety disorder that is specific to or more prevalent in particular cultural groups, such as ataque de nervios or taijin kyofusho.
delusions	False beliefs that persist despite contradictory evidence; a positive symptom of schizophrenia that may include delusions of persecution or grandeur.
dependent personality disorder	A Cluster C personality disorder characterized by excessive need to be cared for and difficulty making independent decisions.
depression	A period of persistently low mood, reduced energy, and diminished interest in activities often associated with bipolar disorders.
depressive disorders	A category of psychological disorders characterized by persistent sad, empty, or irritable mood along with physical and cognitive changes that impair functioning.
developmental period	The time span during childhood and adolescence when neurodevelopmental disorders typically first appear and are identified.
disorganized motor behavior	Abnormal or purposeless physical movements and behaviors; a symptom of schizophrenia that may manifest as catatonia.
disorganized thinking or speech	A positive symptom of schizophrenia characterized by incoherent or illogical thought patterns and speech, such as word salad.
dissociation	A disconnection or separation from consciousness, memory, identity, emotion, perception, body representation, motor control, or behavior.
dissociative amnesia	A dissociative disorder involving the inability to recall important personal information, typically related to traumatic or stressful events.
dissociative disorders	A category of psychological disorders characterized by disruptions in consciousness, memory, identity, emotion, perception, body representation, motor control, and behavior.
dissociative identity disorder	A dissociative disorder characterized by the presence of two or more distinct personality states or identities, often resulting from severe trauma.
dopamine hypothesis	A biological theory suggesting that schizophrenia may result from imbalances in dopamine, a neurotransmitter in the brain.
emotional detachment	A symptom characterized by reduced emotional responsiveness and disconnection from others, often occurring in trauma and stressor-related disorders.
emotional responses	Feelings and affective reactions that can be maladaptive and contribute to the etiology of obsessive-compulsive and related disorders.
empty mood	A symptom of depressive disorders characterized by a sense of emotional numbness or lack of feeling rather than active sadness.
feeding and eating disorders	Psychological disorders characterized by altered consumption or absorption of food that impairs health or psychological functioning.
flashbacks	Intrusive, vivid recollections of traumatic or stressful experiences that feel as if they are happening in the present moment.
flat affect	A negative symptom of schizophrenia characterized by a lack of emotional expression or reduced emotional responsiveness.
fugue	A dissociative state involving sudden, unexpected travel away from home or one's usual environment, often accompanied by amnesia about one's identity or past.
generalized anxiety disorder	An anxiety disorder characterized by prolonged experiences of nonspecific anxiety or fear.
genetic sources	Hereditary factors and family history that may predispose individuals to developing obsessive-compulsive and related disorders.
hallucinations	False perceptions or sensory experiences that occur without external stimuli; a positive symptom of schizophrenia that may involve one or more senses.
histrionic personality disorder	A Cluster B personality disorder characterized by excessive emotionality and attention-seeking behavior.
hoarding disorder	A disorder characterized by persistent difficulty discarding possessions, regardless of their actual value, resulting in excessive accumulation of items.
hostility	Aggressive or antagonistic behavior and attitudes that may manifest as a symptom of trauma and stressor-related disorders.
hypervigilance	A state of heightened alertness and constant scanning of the environment for potential threats, often seen in trauma and stressor-related disorders.
insomnia	A sleep disorder characterized by persistent difficulty falling or staying asleep.
irritable mood	A symptom of depressive disorders characterized by increased irritability, frustration, or anger rather than sadness.
learned associations	Connections between stimuli formed through experience that can contribute to the development and maintenance of obsessive-compulsive symptoms.
major depressive disorder	A depressive disorder characterized by one or more major depressive episodes involving depressed mood or loss of interest/pleasure lasting at least two weeks with significant functional impairment.
maladaptive thinking	Unhealthy or counterproductive thought patterns that contribute to psychological distress and the development of psychological disorders.
mania	A period of abnormally elevated mood, increased energy, and heightened activity often associated with bipolar disorders.
narcissistic personality disorder	A Cluster B personality disorder characterized by grandiosity, need for admiration, and lack of empathy.
negative symptoms	Symptoms of schizophrenia characterized by the absence or reduction of typical behaviors, such as flat affect or lack of movement.
neurodevelopmental disorders	A group of disorders that begin during the developmental period and involve difficulties with behaviors and skills appropriate for a person's age or maturity level.
obsessions	Intrusive, unwanted thoughts, images, or urges that cause anxiety or distress and are difficult to control or dismiss.
obsessive-compulsive disorder	A mental disorder characterized by the presence of obsessions (intrusive thoughts) and compulsions (repetitive behaviors) that significantly interfere with daily functioning.
obsessive-compulsive personality disorder	A Cluster C personality disorder characterized by preoccupation with orderliness, perfectionism, and control.
panic attacks	Unanticipated and overwhelming biological, cognitive, and emotional experiences of fear or anxiety that occur in panic disorder.
panic disorder	An anxiety disorder characterized by the experience of panic attacks, which are unanticipated and overwhelming biological, cognitive, and emotional experiences of fear or anxiety.
paranoid personality disorder	A Cluster A personality disorder characterized by pervasive distrust and suspicion of others.
persistent depressive disorder	A depressive disorder characterized by a chronically depressed mood lasting at least two years in adults, with symptoms less severe than major depressive disorder but more enduring.
personality disorders	Enduring patterns of internal experience and behavior that deviate from one's culture, are inflexible and pervasive, begin in adolescence or early adulthood, remain stable over time, and cause personal distress or impairment.
physical changes	Bodily symptoms in depressive disorders, such as changes in sleep, appetite, energy level, or psychomotor activity.
positive symptoms	Symptoms of schizophrenia involving the presence of abnormal experiences or behaviors, such as delusions, hallucinations, and disorganized speech.
posttraumatic stress disorder	A trauma and stressor-related disorder that develops following exposure to a traumatic event and involves symptoms such as flashbacks, hypervigilance, and emotional distress.
sad mood	A primary emotional symptom of depressive disorders characterized by persistent feelings of sadness or unhappiness.
schizoid personality disorder	A Cluster A personality disorder characterized by detachment from social relationships and restricted emotional expression.
schizophrenic spectrum disorders	A group of mental health conditions characterized by disturbances in thought, perception, emotion, and behavior, including symptoms such as delusions, hallucinations, and disorganized thinking.
schizotypal personality disorder	A Cluster A personality disorder characterized by eccentric behavior, unusual perceptual experiences, and social anxiety.
severe anxiety	Intense fear or worry that persists as a symptom of trauma and stressor-related disorders.
social anxiety disorder	An anxiety disorder involving intense fear of being judged or watched by others.
specific phobia	An anxiety disorder involving fear or anxiety toward a specific object or situation, such as heights or spiders.
stress	A psychological and physiological response to demands or threats that can affect behavior, mental processes, and physical health.
taijin kyofusho	A culture-bound anxiety disorder experienced mainly by Japanese people in which individuals fear that others are judging their bodies as undesirable, offensive, or unpleasing.
trauma	A deeply distressing or disturbing experience that can serve as a cause or contributing factor to dissociative disorders.
trauma and stressor-related disorders	A category of psychological disorders characterized by exposure to a traumatic or stressful event followed by psychological distress and maladaptive symptoms.
word salad	A pattern of speech in which words are strung together in nonsensical or incoherent ways, reflecting disorganized thinking.

Frequently Asked Questions

What is AP Psych 5.4 about?

AP Psych 5.4 covers selected categories of psychological disorders and representative disorders within each category. You need to identify symptoms and explain possible causes using psychological perspectives.

What disorder categories are tested in AP Psychology 5.4?

The topic includes neurodevelopmental, schizophrenic spectrum, depressive, bipolar, anxiety, obsessive-compulsive and related, dissociative, trauma and stressor-related, feeding and eating, and personality disorders.

What does “categories” mean in AP Psychology disorders?

Categories are groups of related disorders that share patterns of symptoms or causes. For example, anxiety disorders involve excessive fear or anxiety, while depressive disorders involve mood and functioning changes.

How should I study disorder symptoms for AP Psych?

Focus on signature symptoms that distinguish look-alike disorders. For example, panic disorder involves repeated panic attacks, while social anxiety disorder centers on fear of being judged by others.

What causes psychological disorders in AP Psych?

Possible causes can include biological, genetic, environmental, behavioral, cognitive, social, and cultural factors. The best exam answers connect a specific cause to the disorder in context.

Do I need to know every disorder in the diagnostic manual for AP Psych?

No. The AP Psychology exam focuses on the disorders named in Topic 5.4. It is better to know those selected examples well than to memorize extra disorders outside the topic.