UPDATED TWIN STUDY - Gottesman and Shield & ADOPTION STUDY Cadoret and Stewart.

UPDATED TWIN STUDY - Gottesman and Shield & ADOPTION STUDY Cadoret and Stewart. DESCRIPTION + EVALUATION Procedure of Cadoret and Stewart ADOPTION STUDY - -answer-283 males. The correlated their behaviour with that of their adoptive and biological parents Results of Cadoret and Stewart ADOPTION STUDY - - answer-Increased risk of ADHD if biological parents had been convicted of a crime Increased risk of ADHD if adoptive parents had psychiatric problems Conclusion cadoret and stewart ADOPTION STUDY - - answer-Inconclusive. Variety of causes could be nature/nurture CAUSE AND EFFECT - -answer-Can't determine cause and effect in correlation studies DEFINE Concordance rate in twins - -answer-The extent to which behavior is the same between twins Aim of Gottesman and Shield TWIN STUDY - -answerInvestivate concordance rate of schizophrenia in Mz/Dz twin