Genetic explanations of Schizophrenia A03

Question 1

What did Tineari (2004) find?

Answer 1

Adopted children with biological mothers who had Sz were more likely to develop Sz than a control group, even though their adopted parents weren’t schizophrenic

Question 2

What did Hilker (2018) find?

Answer 2

Concordance rates for Sz of 33% for MZ twins and 7% for DZ twins

This shows moderate concordance rates which still supports the role of genes

Question 3

Despite much biological evidence for Sz, there are clearly environmental factors that play a part too, what are these?

Answer 3

Birth complications cause heightened chance of Sz development (Morgan et al. 2017)

Smoking cannabis in teenage years also heightens risk of (Di Forti et al. 2015)

Question 4

What did Morkved (2017) find?

Answer 4

67% of people with Sz and other related psychotic disorders reported at least one childhood trauma. This is contrast to 38% of people in a control group without a psychotic disorder.