psychological disorder
a syndrome marked by a clinically significant disturbance in an individual’s cognition, emotion, regulation, or behavior
attention deficit hyperactivity disorder
a psychological disorder marked by the appearance by age 7 of one or more of three key symptoms: extreme inattention, hyperactivity, and impulsivity
medical model
the concept that diseases, in this case psychological disorders, have physical causes that can be diagnosed, treated, and in most cases, cured, often through treatment in a hospital
DSM-5
the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition; a widely used system for classifying psychological disorders
anxiety disorders
psychological disorders characterized by distressing, persistent anxiety or maladaptive behaviors that reduce anxiety
generalized anxiety disorder
an anxiety disorder in which a person is continually tense, apprehensive, and in a state of autonomic nervous system arousal
panic disorder
an anxiety disorder marked by unpredictable, minutes-long episodes of intense dread in which a person experiences terror and accompanying chest pain, choking, or other frightening sensations. Often followed by worry over a possible next attack
phobia
an anxiety disorder marked by a persistent. irrational fear and voidance of a specific object, activity, or situation
social anxiety disorder
intense fear of social situations, leading to avoidance of such (formerly called social phobia)
agoraphobia
fear or avoidance of situations, such as crowds or wide open places, where one has felt loss of control and panic
obsessive compulsive disorder
a disorder characterized by unwanted repetitive thoughts (obsessions) and/or actions (compulsions)
posttraumatic stress disorder (PTSD)
a disorder characterized by haunting memories, nightmares, social withdrawal, jumpy anxiety, numbness of feeling, and/or insomnia that lingers for four weeks or more after a traumatic experience
posttraumatic growth
positive psychological changes as a result of struggling with extremely challenging circumstances and life crises
mood disorders
psychological disorders characterized by emotional extremes
major depressive disorder
a mood disorder in which a person experiences, in the absence of drugs or another medical condition, two or more weeks with five or more symptoms, at least one o which must be either (1) depressed mood or (2) loss of interest or pleasure
mania
a mood disorder marked by a hyperactive, wildly optimistic state
bipolar disorder
a mood disorder in which a person alternates between the hopelessness and lethargy of depression and the overexcited state of mania (formerly called manic-depressive disorder)
rumination
compulsive fretting; overthinking about our problems and their causes
schizophrenia
a psychological disorder characterized by delusions, hallucinations, disorganized speech, and/or diminished or inappropriate emotional expression
psychosis
a psychological disorder in which a person loses contact with reality, experiencing irrational ideas and distorted perceptions
delusions
false beliefs, often of persecution or grandeur, that may accompany psychotic disorders
hallucination
false sensory experience, such as seeing something in the absence of an external visual stimulus
somatic symptom disorder
a psychological disorder in which the symptoms take a somatic (bodily) form without apparent physical cause
conversion disorder
a disorder in which a person experiences very specific genuine physical symptoms for which no physiological basis can be found (also called functional neurological symptom disorder)
illness anxiety disorder
a disorder in which a person interprets normal physical sensations as symptoms of a disease (formerly called hypochondriasis)
dissociative disorders
disorders in which conscious awareness becomes separated (dissociated) from previous memories, thoughts, and feelings
dissociative identity disorder (DID)
a rare dissociative disorder in which a person exhibits two or more distinct and alternating personalities (formerly called multiple personality disorder)
anorexia nervosa
an eating disorder in which a person (usually an adolescent female) maintains a starvation diet despite being significantly (15 percent or more) underweight
bulimia nervosa
an eating disorder in which a person alternates binge eating (usually high-calorie foods) with purging (by vomiting or laxative use), excessive exercise, or fasting
binge-eating disorder
significant binge-eating episodes, followed by distress, disgust, or guilt, but without the compensatory purging or fasting that marks bulimia nervosa
personality disorders
psychological disorders characterized by inflexible and enduring behavior patterns that impair social functioning
antisocial personality disorder
a personality disorder in which a person (usually a man) exhibits a lack of conscience for wrongdoing, even toward friends and family members. may be aggressive and ruthless or a clever con artist