Genetic explanation for offending behaviour

  • Created by: Georgia
  • Created on: 10-06-19 08:54
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  • Genetic explanation for offending behaviour
    • Twin studies
      • Christiansen (1977) examined over 3500 Danish twin pairs
        • Male twins  MZ = 35%   DZ = 13%
        • Female twins MZ = 21%   DZ = 8%
      • Large sample suggests generalisabilit
      • Ethnocentric as only Danish twins
    • Adoption studies
      • Strength of influence lower in adoption than twin studies
      • 36.2% = bio and adop. fathers
      • 21.4% = bio father only
      • 11.5% = adop only
      • 10.5% = neither father
    • Family studies
      • Convictions of one family member were strongly related to convictions of another
      • ~75% of convicted parents had a convicted child
      • ~75% of families with convicted daughters had convicted sons
    • Evaluation
      • Hard to separate nature and nurture
      • Low concordance suggests environmentainfluence
      • Reductionist
        • Influence of environment and neuro-transmitters

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