Evaluation

• give the strengths of the genetic explanation of OCD?

  NESTADT reviewed twin studies in humans

  found that in 68% of MZ twins both had OCD compared to 31% in DZ twins

  • TTS a strong genetic component to getting ocd
• briefly state 3 weaknesses to the genetic explanation of OCD?

  • Concordance rates
  • no single gene
  • does not explain mechanisms
• State one weakness of the genetic explanation of OCD?

  CONCORDANCE RATES not 100% must be some environmental influence. Therefore genetics is an insufficient explanation alone
• State one weakness of the genetic explanation of OCD?

  No single gene causing the disorder, many scattered across the genome, depends on environmental triggers as to whether OCD is developed
• State one weakness of the genetic explanation of OCD?

  Twin and family studies show the link between genes and OCD but does not explain the genetic mechanisms behind the disorder
• State one weakness of the genetic explanation of OCD?

  Family members often show different symptoms of OCD

  • If the disorder was purely inherited then all their symptoms would be the same?