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PSYCHOLOGICAL DISORDERS
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MEDICAL MODEL APPLIED TO ABNORMAL BEHAVIOR Medical model proposes that it is useful to think of abnormal behavior as a disease Critics: Thomas Szasz—mind can’t be sick Diagnosis : distinguish one illness from another Etiology : causation and developmental history of an illness Prognosis : forecast about probable course of an illness
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CRITERIA OF ABNORMAL BEHAVIOR Deviance : deviating from society’s norms Maladaptive behavior : struggling to adapt Personal distress : usually depression and/or anxiety disorders Evolutionary psychs believe mental disorders should be referred to as evolutionary dysfunctions
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STEREOTYPES OF PSYCHOLOGICAL DISORDERS 1) Psych disorders are incurable 2) People w/psych disorders are often violent and dangerous 3) People w/psych disorders behave in bizarre ways and are very different from normal people
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PSYCHODIAGNOSIS: CLASSIFICATION OF DISORDERS 1952: Diagnostic and Statistical Manual of Mental Disorders (DSM) describes 100 disorders 1980: DSM-III---new classification system Axes I and II diagnose disorders Axes III-V are supplemental info
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PREVALENCE OF PSYCHOLOGICAL DISORDERS Epidemiology : the study of the distribution of mental or physical disorders Prevalence : percentage of population that exhibits a disorder during a specific time period DSM criteria: 1/3 of pop. has some psych disorder
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ANXIETY DISORDERS A class of disorders marked by feelings of excessive apprehension and anxiety
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GENERALIZED ANXIETY DISORDER DEF: marked by a chronic, high level of anxiety that is not tied to any specific threat Called “free-floating anxiety” Worry about minor matters Physical symptoms: trembling, muscle tension, diarrhea, dizziness, faintness, sweating, heart palpitations
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PHOBIC DISORDERS DEF: marked by a persistent and irrational fear of an object or situation that presents no realistic danger Even imagining the object can trigger anxiety
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PANIC DISORDER AND AGORAPHOBIA Panic disorder : characterized by recurrent attacks of overwhelming anxiety that usually occur suddenly and unexpectedly Agoraphobia : fear of going out to public places Majority who suffer from one or both are female
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OBSESSIVE-COMPULSIVE DISORDER OCD: marked by persistent, uncontrollable intrusions of unwanted thoughts and urges to engage in senseless rituals Obsessions are thoughts Compulsions are actions
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ETIOLOGY OF ANXIETY DISORDERS
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BIOLOGICAL FACTORS Concordance rate : indicates the percentage of twin pairs or other pairs of relatives that exhibit the same disorders Anxiety sensitivity Neurotransmitters
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CONDITIONING AND LEARNING Anxiety responses are acquired by classical conditioning They are maintained by operant conditioning Phobias could be evolutionary Observational learning may also play a part
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COGNITIVE FACTORS Some are more likely to have anxiety b/c they tend to: 1) misinterpret harmless situations as threatening 2) focus excessive attention on perceived threats 3) selectively recall info that seems threatening
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PERSONALITY AND STRESS Certain personality traits appear to be related to likelihood of anxiety Neuroticism---nervous, jittery, insecure, guilt- prone, gloomy
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SOMATOFORM DISORDERS Physical ailments that cannot be fully explained by organic conditions and are largely due to psychological factors
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SOMATIZATION DISORDER DEF: marked by a history of diverse physical complaints that appear to be psychological in origin Usually a very diverse array of symptoms
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CONVERSION DISORDER DEF: characterized by a significant loss of physical function (w/no apparent organic basis), usually in a single organ system
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HYPOCHONDRIASIS DEF: characterized by excessive preoccupation w/health concerns and incessant worry about developing physical illnesses Usually coupled w/ anxiety disorders and depression
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ETIOLOGY OF SOMATOFORM DISORDERS
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PERSONALITY FACTORS Histrionic personality most prevalent Self-centered, suggestible, excitable, highly emotional, overly dramatic Neuroticism also common
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THE SICK ROLE Being sick is a way to avoid life’s challenges Creates an excuse for failure Gets attention from others
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DISSOCIATIVE DISORDERS Class of disorders in which people lose contact w/portions of their consciousness or memory, resulting in disruptions in their sense of identity
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DISSOCIATIVE AMNESIA AND FUGUE Dissociative Amnesia : sudden loss of memory for important personal info that is too extensive to be due to normal forgetting Dissociative Fugue : loss of memory for entire life along with sense of identity
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DISSOCIATIVE IDENTITY DISORDER DID: involves the coexistence in one person of 2 or more largely complete, and usually very different, personalities Personalities usually unaware of each other Alternate personalities exhibit traits unusual for original personality
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ETIOLOGY OF DISSOCIATIVE DISORDERS Nicholas Spanos: DID patients are merely role- playing to mask personal failure Trauma does seem to be the main cause of development of DID
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MOOD DISORDERS Class of disorders marked by emotional disturbances of varied kinds that may spill over to disrupt physical, perceptual, social, and thought processes
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MAJOR DEPRESSIVE DISORDER DEF: show persistent feelings of sadness and despair and a loss of interest in previous sources of pleasure Depression can occur at any point in life Dysthynic disorder : chronic depression that is insufficient in severity to justify diagnosis of a major depressive episode
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BIPOLAR DISORDER DEF: characterized by the experience of one or more manic episodes usually accompanied by periods of depression Cyclothymic disorder : exhibit chronic but relatively mild symptoms of bipolar disturbance
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ETIOLOGY OF MOOD DISORDERS
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GENETIC VULNERABILITY Heredity can create a predisposition Environmental factors may determine if it becomes an actual disorder
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NEUROCHEMICAL FACTORS Norepinephrine and serotonin thought to be the main NT’s Recent studies are showing that other NT’s may be involved
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COGNITIVE FACTORS Depression caused by Learned helplessness ---a passive “giving up” People with pessimistic explanatory style are most susceptible to depression Hopelessness theory : pessimistic style, high stress, low self-esteem, etc… create depression Basically…negative thoughts and emotions lead to and maintain depression
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INTERPERSONAL ROOTS Behaviorist approach Inadequate social skills lead to depression Depressed people are depressing
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