Adoption Study refers to a method of comparing genetic versus environmental contributions to a disorder by tracking the Incidence of disorders in children whose biological parents have diagnosed psychological disorders but whose rearing parents do not.

Adoption Study is a term in genetics research, it is the study of first degree relatives reared in different families and environments. If they share common characteristics, such as a disorder, this finding suggests that those characteristics have a genetic component
Other /More definition:
Adoption study refers to the study of the heritability of a disorder by finding adopted people with a disorder and then determining the prevalence of the disorder among their biological and adoptive relatives, in order to separate out contributing genetic and environmental factors.
Other /More definition:
Adoption Study refers to the study of first degree relatives reared in different families and environments in Genetic research. If they share common characteristics, such as a disorder, this finding suggests that those characteristics have a genetic component.