Bio explanations - genetic theory Flashcards
The genetic explanation states that SZ is hereditary and…
passed on from one generation to the next through genes
What does genetic explanation state some people are born with?
Genetic predisposition to SZ
What genes increase a person’s likelihood to developing SZ?
-the inheritance of several maladaptive candidate genes such as PCM1 (polygenic)
Studies have shown that ___ separate genetic variations are associated in the risk of developing SZ
108
How many twins did Gottesman study?
40 twins
What concordance rates did Gottesman find?
Gottesman found a concordance rate for monozygotic twins (identical) was 48% and only 17% for dizygotic twins (non-identical)
Research to support genetics was conducted by…
Tierny
Who did Tierny study?
-Tierny studied 155 adopted children who had biological mothers with SZ
Who did Tierny compare his findings of the adopted children who had bio mothers with?
-He compared the findings to adopted children without SZ
What was found in Tierny’s study?
-it was found that there was a 10% concordance rate in adopted children with biological SZ mothers compared to 1% concordance in adopted children without SZ mothers
Why does Tierney’s research provide support for genetic theory?
-Provides signifiant support for the role of genetics as the role of Social Learning Theory (observing and imitating behaviours of SZ parents) could not have been a factor.
