Holland et al (1988) Twin Study
Outline and evalution of Holland et al' study linking abnormality to genetics
- 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
- WHY?
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