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Biological explanations for schizophrenia

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Question 5

Researchers investigating the role of nature versus nurture in schizophrenia compiled data from several European twin registries. The study calculated concordance rates—the probability that one twin develops schizophrenia given that the other has already been diagnosed.

The findings showed:

  • Monozygotic (MZ) twins (sharing 100% of their DNA): 51%
  • Dizygotic (DZ) twins (sharing approximately 50% of their DNA): 16%
  • Adopted siblings (sharing 0% of their DNA but raised in the same household): 2.5%

Discuss what these findings suggest about biological explanations of schizophrenia.

[4]

Biological explanations for schizophrenia Questions

  1. A Level
  2. /Psychology
  3. /Biological explanations for schizophrenia

Practise AQA A Level Psychology Biological explanations for schizophrenia with exam-style questions for A Level Psychology. 17 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank