Biological Explanations the biological explanation of schizophrenia 2.0 / 5 based on 1 rating ? PsychologyA2/A-levelAll boards Created by: Lucy RobinsonCreated on: 03-04-12 10:11 genetic = twin TWIN, FAMILY, ADOPTION studies. TWIN- GOTTESMAN. Twin Studies show genetic and environmental influences. Identical twins = more concordant MZ (identical) concordance rate = 48% DZ (non identical) concordance rate = 17% 1 of 3 = family GOTTESMAN SZ runs in families? closer the relative the greater the risk neither parent - 1% chance 1 parent has it - 16% chance both parents have it - 48% chance 2 of 3 = adoption TIENARI GROUP 1 = 155 SZ women gave children to adoption. GROUP 2 = 155 non SZ women gave children to adoption. FOUND = 10.3% developed SZ in group 1 1.1% developed SZ in group 2 so......evidence that SZ runs in families. the more genetically simular = greater the risk. 3 of 3
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