Biological explanation for schizophrenia


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1. Gottesman (1991) found that the incident rate for schizophrenia in the general population was 1%, if the sibling had schizophrenia is 8%, if one parent has schizophrenia is 16% and if both parents have schizophrenia it's?

  • 73%
  • 100%
  • 46%
  • 50%
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2. Post mortem studies have found that

  • schizophrenic individuals had normal dopamine levels
  • antipsychotic drugs elevated dopamine levels
  • the dopamine hypothesis is right and antipsychotic drugs lower dopamine levels
  • antipsychotic drugs do nothing

3. Tienan (2000) found that schizophrenia incident rates with adoptees who’s mothers had schizophrenia was 7% and whos mothers didn't have schizophrenia was?

  • 4%
  • 2%
  • 3%
  • 1%

4. Jacobs argues that adoptive parents would know if the birth parents were schizophrenic or not and that most wouldn’t adopt this child. This criticizes....

  • Twin Studies
  • The dopamine hypothesis
  • Adoptive Studies
  • Family studies

5. One biological explanation is that genetic factors cause schizophrenia. Which of the following show that genes influence the incident rate of schizophrenia

  • Family Studies
  • Adoption Studies
  • All of the choices
  • Twin Studies
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