ABSTRACT
Underlying all behavioral genetic study designs is the principle that relatives share genes and the additional fact that some relatives, such as siblings, share more genes with each other than with their cousins helps us determine whether heredity is implicated in a disorder. This chapter introduces the ways in which behavioral geneticists find and estimate the effects of genes and the environment. It gives readers sufficiently detailed information on methods and statistics used in the field to enable them to digest and critically appraise the behavioral genetic research reported in the major journals, and to evaluate its implications for their patients.
