Psychological Disorders Etiology of Schizophrenia As with other psychological disorders, researchers have studied the etiology of schizophrenia from different perspectives. Biological Factors Research suggests that genes, neurotransmitters, and brain abnormalities play a role in the onset of schizophrenia: • Genetic predisposition: Substantial evidence suggests that there is a genetically inherited predisposition to schizophrenia. For example, there is a concordance rate of about 48 percent for identical twins. The concordance rate for fraternal twins is considerably less, about 17 percent. Concordance rate refers to the percentage of both people in a pair having a certain trait or disorder. A person who has two parents with schizophrenia has about a 46 percent chance of developing schizophrenia. This probability is very high compared to the roughly 1 percent chance of developing schizophrenia in the general population. • Neurotransmitters:
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This note was uploaded on 01/23/2012 for the course PSY PSY2012 taught by Professor Scheff during the Winter '09 term at Broward College.