Gottesman and Shields

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  • Created by: Steff06
  • Created on: 31-05-16 10:57
What does the biological approach favour?
Biological favours nature side of nature-nurture debate.
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What do biological explanations of behaviour assert?
Assert that something in our biology causes our dysfunctional behaviour such as a genetic cause or malformation of brain structures.
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What was the aim of Gottesman and Shields research?
To review research in genetic transmission of schizophrenia.
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Describe the methodology of Gottesman and Shield's study
A review of adoption and twin studies into schizophrenia between 1967 and 1976.
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What were the studies reviewed?
3 adoption studies and 5 twin studies.
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Describe the participants
711 in the adoption studies. 210 monozygotic twin pairs in the twin studies and 319 dizygotic twin pairs studied.
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What was extrapolated from the research?
The incidence of schizophrenia in adopted children and monozygotic twins was extrapolated.
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How was this done?
Done by comparing biological parents and siblings and adoptive parents and siblings in the adoption studies.
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What was compared in the twin studies?
The concordance rates were compared for monozygotic and dizygotic twins.
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What would indicate a genetic basis for schizophrenia?
An increased incidence of schizophrenia in biological relatives and higher concordance rates between monozygotic twins would indicate a genetic basis.
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What did all 3 adoption studies find?
Found an increased incidence of schizophrenia in adopted children with a schizophrenic biological parent.
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Who showed little evidence of schizophrenia?
Normal children fostered to schizophrenic parents and adoptive parents of schizophrenic children.
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What did one of the studies find about biological siblings?
Found that biological siblings of children with schizophrenia showed a much higher percentage of schizophrenia (19.2%) than adoptive siblings (6.3%).
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What did all twin studies find?
All found a higher concordance rate for schizophrenia in monozygotic twins than dizygotic twins.
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What were these concordance rates for monozygotic twins compared to dizygotic twins?
58% concordance rates in monozygotic twins compared to 12% in dizygotic twins.
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What conclusion was drawn about biology and schizophrenia?
There is obviously a significant genetic input into the onset of schizophrenia.
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What evidence did they find against biology causing schizophrenia?
Concordance rates were less than 100% so there must be some interaction with the environment.
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What is there confusion over?
Confusion as to whether 1 or many genes are responsible for predisposing a person to schizophrenia.
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Card 2

Front

What do biological explanations of behaviour assert?

Back

Assert that something in our biology causes our dysfunctional behaviour such as a genetic cause or malformation of brain structures.

Card 3

Front

What was the aim of Gottesman and Shields research?

Back

Preview of the front of card 3

Card 4

Front

Describe the methodology of Gottesman and Shield's study

Back

Preview of the front of card 4

Card 5

Front

What were the studies reviewed?

Back

Preview of the front of card 5
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