PSYC 3140 Lecture Notes - Lecture 2: Twin, Panic Disorder, Diazepam
3 Jan 2019
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Document Summary
Can be used to study a genetic predisposition among members of a family because the average number of genes shared by two blood relatives is known. 23 pairs of chromosomes in a human, 23 from mother and. Individuals who bear the diagnosis in question a. Then relatives are studied to determine applied to them the frequency with which the same diagnosis may be e. g. , schizophrenia. Degree of genetic relatedness to self - image: twin method - compare monosygodate and dyzezygotate twins. When the mz concordance rate is higher than the dz rate, the characteristic being studied is said to be heritable. Concordance: the similarity in psychiatric diagnosis or in other traits within a pair of twins. Twin method: hinges on equal environment assumption that environmental factors that are partial causes of concordance are equally influentia l for mz and dz pairs e. g. , stressful life events.
