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1. give the 3 main psychological explanations of ocd?

  • develpomental, cognitive, psychodynamic
  • behavioural, cognitive, psychodynamic
  • behavioural, psychological,cognitive
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2. what concordance rates were found between twins with OCD?

  • 87% concordance between MZ twins only 13% environmental
  • 96% DZ twins with only 4% environmental
  • 40% concordance rates

3. name an alternative gene to the COMT gene and what it showed?

  • the SAPAP3 gene which showed and increase in grooming with mice
  • the SAPAP gene showing a decrease in mice grooming themselves

4. name 3 behaviours that result as evolutionary adaptations

  • brushing, dancing, stuttering
  • grooming, concern for others, hoarding
  • cleaning, tidying, hoarding

5. do antidepressants increase or decrease serotonin levels?

  • increase which reduces the anxiety which stimulates an obsession
  • decrease which reduces the anxiety associated with an obsession


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