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PSYCH 3F03 (153)
Lecture

Lecture 3

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Department
Psychology
Course
PSYCH 3F03
Professor
Paul W Andrews
Semester
Winter

Description
Lecture 3: Mechanisms for maintaining disorders in Population Recap ­ Evolutionary definition of disorder involves an adaptation that is not operating as  it evolved to function ­ Reverse engineering process is useful in understanding both adaptation and  disorder ­ Conceptual blueprint of how the adaptation is supposed to be structured and  operate ­ Map of how things can go wrong Implications ­ This is a strict definition of disorder ­ Sometimes conflicts with medical use of the term o Some physicians and clinicians consider ‘disorder’ to be any condition  that warrants treatment ­ According to evolutionary definition, we are much less certain about what is and  isn’t a disorder o Depression, anxiety, PTSD, anorexia, substance abuse o Schizophrenia seems like it is a disorder but we don’t know what the  adaptation is that is malfunctioning  ­ Accurately distinguishing between normally functioning adaptation and disorder  (malfunctioning adaptation) has important treatment implications  o Eg. Fever ­ Therefore, the issue is not whether the treat; it is how best to treat o If normally functioning adaptation  ▯treat the cause that triggered it (e.g.  infection) o If true instance of disorder  ▯suppress harmful symptoms (eg. Genetic  causality of Fever)  Why are we spending time on disorder? ­ Class is about using evolutionary theory to get insight into human behaviour ­ Human health and medicine is easily the domain where evolutionary theory yields  the greatest insight According to psychiatry, humans have so many disorders they are falling apart ­ Blanco et al. (2008) study – survey of young adults in North America ­ Used DSMs diagnostic criteria, to measure number of disorders (over the last  year) What are the disorders? Substance use disorders – 30% ­ Alcohol: 17­20% ­ Drugs: 5­7% ­ Nicotine: 14­21% Mood disorders – 11% ­ Major depression: 7% ­ Bipolar: 3­5% Anxiety Disorders – 12% ­ Panic: 2­3% ­ Social anxiety: 3­4% ­ Phobias: 8­9% Personality disorders: 18­22% ­ OCD: 8% ­ P
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