Schizophrenia Genetics Quiz

What is the main method used by psychologists to investigate the genetic basis of schizophrenia?

• Heritability studies

• Case studies

• Longitudinal studies

• Experimental studies

According to Gottesman (1991), what was the concordance rate for schizophrenia in MZ twins?

• 17%

• 48%

• 25%

• 60%

What did Claridge and Davis (2003) find about the concordance rates for MZ twins?

• 0% - 90%

• 10% - 50%

• 20% - 70%

• 30% - 80%

What did Gottesman and Bertelsen (1989) find about the risk of schizophrenia in people whose parent had an identical twin with the disorder?

• 5% chance

• 17% chance

• 25% chance

• 50% chance

What was the percentage of adoptees diagnosed with schizophrenia in the study by Tienari et al (2000)?

• 2%

• 4%

• 6.7%

• 10%

What does it mean when schizophrenia is described as polygenic?

• It is caused by a single gene.

• It is determined by multiple genes.

• It is not influenced by genetics.

• It is caused by environmental factors only.

What is the diathesis stress model in relation to schizophrenia?

• It suggests schizophrenia is purely genetic.

• It suggests schizophrenia is purely environmental.

• It suggests a genetic predisposition requires an environmental trigger.

• It suggests schizophrenia is caused by diet.

What is a limitation of heritability studies in schizophrenia research?

• They are experimental and show clear cause and effect.

• They often have large sample sizes.

• They are non-experimental and cannot establish cause and effect.

• They ignore genetic factors.

Why might the genetic explanation of schizophrenia be considered reductionist?

• It includes psychological, cultural, and social factors.

• It focuses only on biological factors.

• It considers environmental influences.

• It accounts for free will.

What does the term "nomothetic" imply in the context of explaining schizophrenia?

• A) It considers individual differences.

• B) It focuses on general laws and ignores individual variations.

• C) It emphasizes personal experiences.

• D) It is based on case studies.