Holland et al (1988) Twin Study

Outline and evalution of Holland et al' study linking abnormality to genetics

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  • Created by: Rachael
  • Created on: 12-12-12 20:18
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  • HOLLAND ET AL (1988)-TWIN STUDY
    • WHY?
      • Wanted to know whether the suspectability to suffer from anorexia nervosa was inherited
    • HOW?
      • They compared rates in anorexia identical and non-identical twins
    • FINDINGS
      • 56%  of identical twins both suffered from anorexia but only 5% of non-identical twins both did
    • CONCLUSION
      • Anorexia may have a significant genetic component
    • EVALUATION
      • Other factors may influence the problem e.g. only 56% of monozygotic twins both suffered from anorexia
      • Diagnosing anorexia is difficult, so we can't be certain if the twins were anorexic
      • Extraneous variable influences the results, otherwise 100% of monozygotic twins would share anorexia

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