Biological approach: Genetics

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Family - Kety & Ingram
Found prevalence rates of Sz were 10x higher among genetic relatives rather than adopted relatives of Sz's - It suggested that genetics play a greater role than environmental factors.
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Twin - Gottesman & Shields
They performed a meta-analysis - MZ twins concordance rate= 46% - DZ twins concordance rate= 14%
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Twin - Rosenthal
Studied 16 pairs of MZ twins who had been reared apart; this allowed them to look at the relative contributions in both heredity and environment - He found that in 10 pairs the second twin also went on to develop Sz - The concordance rate= 62.5%
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Adoption - Kety
They considered adults who had been adopted at an early age - Half had been diagnosed as suffering from Sz - The 2 groups matched on variables such as sex and age - Rate of Sz in biological relatives of those with Sz (13%) without (2%)
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Card 2

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They performed a meta-analysis - MZ twins concordance rate= 46% - DZ twins concordance rate= 14%

Back

Twin - Gottesman & Shields

Card 3

Front

Studied 16 pairs of MZ twins who had been reared apart; this allowed them to look at the relative contributions in both heredity and environment - He found that in 10 pairs the second twin also went on to develop Sz - The concordance rate= 62.5%

Back

Preview of the back of card 3

Card 4

Front

They considered adults who had been adopted at an early age - Half had been diagnosed as suffering from Sz - The 2 groups matched on variables such as sex and age - Rate of Sz in biological relatives of those with Sz (13%) without (2%)

Back

Preview of the back of card 4

Card 5

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thdghgshr

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