337 final Flashcards
(342 cards)
Wakefield’s Harmful Dysfunction
- harmful: value based on social norms
- dysfunction: failure of an organ system to perform according to its evolutionary design
- the cause of symptoms must be mental to be a ‘mental disorder’
Skeptical view
- Thomas Szasz
- mental disorder is a label to justify medical intervention in a socially undesirable behaviour
- labels result in stigma and social control
- mental disorder should be an extension of physical and only be applicable to physical lesions
Pure Value Concept view
- mental and physical disorders are judgments of desirability
- disorder is a deviation from an ideal state
As Biological Disadvantage
- purely biological
- decreases survival and reproductive fitness
- must also include statistical deviance view
Lillienfeld critique
- questions what is natural function (the primary function of an organ system) and what is a by-product
Widiger proposal
- disorders are constructs that must be measured indirectly
- conceptualization will evolve as knowledge evolves
- multimodal: latent constructs are multiply determined and multiply expressed (a single etiology would be ideal, but is unlikely)
five factors necessary for a valid classification system
- Clinical description: common clustered signs and symptoms
- Course: similar trajectory
- Treatment response
- Family history: should run in families
- Laboratory studies: biological and psychophysiological associations
challenges of a categorical system
- Heterogeneity: people in one group should look similar to each other and different from people in a separate group (this isn’t always the case)
- Comorbidity: 50% of people with one disorder meet criteria for another; how do you know which problem to treat first? Will affect Tx, severity, and prognosis
DSM-I and DSM-II
- 1952 and 1968
- few categories with no requirement for number of symptoms
- based on psychoanalytic definitions
- a first attempt to standardize
DSM-III and DSM-III-TR
- 1980 and 1987
- based on a medical model
- empirical (not psychoanalytic, based on symptoms instead of etiology)
- based on a consensus of professionals to define inclusion/exclusion criteria and duration
- multi-axial classification
I: Major Clinical Disorders (the problem to treat)
II: Personality Disorders (not to treat, but could affect axis I)
III: Medical Conditions
IV: Psychosocial Stressors (context)
V: Global Assessment of Functioning (somewhat arbitrary)
DSM-IV
- 1994 and 2000
- introduced distress and impairment as factors
- gave a definition of mental illness
- polythetic approach: certain signs and symptoms are neither necessary or sufficient
DSM-5
- 2013
- removes multi-axial system
- some diagnoses get dimensional criteria
- new categories (OCD, PTSD is moved to Trauma)
what could comorbidities be due to
- chance (partly)
- sampling bias (more severe clinical populations)
- diagnostic criteria (overlap between diagnoses)
- multiformity (comorbid disorders represent a third independent disorder)
- causal (one disorder is a risk factor for another)
- shared etiology causes multiple disorders
which disorders are where in HiTOP
- SAD: internalizing - fear
- Agoraphobia: internalizing - fear
- Phobias: internalizing - fear
- Panic: internalizing - fear
- OCD: internalizing - fear
- MDD: internalizing - distress
- GAD: internalizing - distress
- PTSD: internalizing - distress
- Bipolar: internalizing - mania AND thought - mania (also closely related to psychosis)
1-year prevalences of disorders from most common to least
- MDD
- SAD (specific phobias may be 2nd most common)
- PTSD
- GAD
- Panic
- PDD
- OCD
lifetime prevalences of disorder categories from most to least common
- anxiety disorder
- mood disorder
- substance use disorders
- prevalence for any disorder is 46%
vulnerability-stress correlations
- demonstrate that diatheses and stress aren’t independent
- stress generation: people who are more vulnerable may behave in ways that increase their stress
- scars: having had one illness may change your view of the world which can exacerbate your stress
etiological heterogeneity
- there are many pathways to disorder
- captured by dimensional diathesis-stress models: low diathesis might still be capable of developing disorders at high enough levels of stress (not all-or-none like the original categorical diathesis-stress model)
differentiation between syndrome, disorder, disease
- syndrome: cluster of signs and symptoms that tend to co-occur, but pathology and etiology aren’t well-understood
- disorder: syndromes that cannot be explained by other conditions
- disease: most understood - both pathology and etiology
endophenotype approach vs. exophenotype approach
- endo: focus on identifying reliable biomarkers or lab indicators that are only present in the disordered population
- exo: focus on traditional signs and symptoms (DSM’s approach)
follow-up design
- start with people who are already ill and follow-up over time (prospective)
- studying the natural course of a disorder
high-risk design
- start with a sample likely to develop psychopathology and follow-up over time (prospective)
- temporal ordering
vulnerability marker
- should be present before, during, and after the illness
- if only after, could be a scar
- if it resolves with the illness, could be a subthreshold presentation
- should be over-represented in high-risk populations
case control design
compare group with disorder to group without disorder (useful for rare disorders)