PSY100H1 Chapter Notes - Chapter 9.3: Cognitive Training, Environmental Noise, Heritability Of Iq
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PSY100H1 Full Course Notes
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Document Summary
Our behaviours and abilities are linked to our biology. The genetics of intelligence: twin and adoption studies: The first step to understanding the genetic contributions to high intelligence is to determine the extent to which intelligence is related to our genes. Intelligence is believed to be in our genes, and that we are born with it. Studies of twins and children who have been adopted have been key tools allowing researchers to begin estimating the genetic contribution to intelligence. Research has showed that genetic similarity does contribute to intelligence test scores. The intelligence scores of identical twins correlates with eachother at about 0. 85 when they are raised in the same home, which is much higher than the correlation of fraternal twins. Even when identical twins are adopted and raised apart, their intelligence scores still correlate at about 0. 80, a very strong relationship. The heritability of intelligence is estimated to be between 40-80%.
