Google

A research method used in behavioral genetics that compares the probability of a shared behavioral trait between identical and fraternal twins. This comparison helps to provide insight into the relative importance of genetic and environmental factors in the expression of that trait.

Twin Studies

About half of monozygotic twins with schizophrenia are concordant with the disorder, where it is only 17% for dizygotic twins. This shows evidence for genetic factor for the disorder, since monozygotic twins are more closely related than dizygotic twins.

Twin Studies with those with Schizophrenia

Conducted from 1979 to 1999, the Minnesota Study of Twins Reared Apart is a landmark study in behavioral genetics that examined the genetic basis of personality. By studying 350 pairs of identical and fraternal twins who were raised both together and apart, researchers discovered that identical twins exhibit very similar personalities, regardless of their upbringing. This finding provides strong evidence for the heritability of certain personality traits and is central to discussions on genetic influences on personality.

The Minnesota Study of Twins Reared Apart

A researcher studying the origins of a specific psychological trait finds that if one identical twin has the trait, there is an 85% probability that the other twin also has it. For fraternal twins, the probability is only 30%. What is the most logical conclusion to draw from these findings?

Learn Before

Related