The biological approach to explaining OCD: genetic explanations evaluation

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Strength: there is evidence that some people are vulnerable to OCD as a result of their genetic makeup

  • Nestadt et al (2010) reviewed previous twin studies and found that 68% of identical twins shared OCD compared to 31% of nonidentical twins
  • This strongly suggests a genetic influence in OCD

Weakness: a genetic explanation is unlikely to ever be very useful because it provides little predictive value

  • Psychologists have been quite unsuccessful at pinning down all the genes involved in OCD
  • One reason for this is that it appears that several genes are involved and…

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