PSYCH 3EV3 Lecture Notes - Lecture 2: Emil Kraepelin, Multiple Working, Natural Selection
18 Oct 2017
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Emil kraepelin, dsm-iii, dsm-iv, dsm-v all endorse disorder as involving dysfunction. Dysfunction operationally defines as involving pain, distress and impairment. Three possible meanings of function: any beneficial effect of trait/object. However, objects can serve many beneficial purposes other than that which you might use it for: the purpose for which it was created. However, evolution is retrospective and adaptations are not made with a purpose: an effect that explains the structure and operation of a trait/object. Natural selection builds on effects, which may serve some benefit in the environment, eventually creating something with a function. Natural sele(cid:272)tio(cid:374) is the o(cid:374)l(cid:455) k(cid:374)o(cid:449)(cid:374) e(cid:454)pla(cid:374)atio(cid:374) for (cid:271)iologi(cid:272)al trait (cid:449)ith (cid:858)fu(cid:374)(cid:272)tio(cid:374)s(cid:859) Every true instance of disorder involves a malfunction in an evolved adaptation and a social judgement that it is harmful to self or others. In order to know that something is a disorder, we must know which adaptations are malfunctioning.
