At first glance, research in behavioral genetics appears to be irrelevant to clinical practice. Rarely do articles comparing the efficacy of different psychotherapeutic approaches make reference to findings in genetics. By the same token, few behavioral genetic research reports discuss the clinical implications of their findings. The independence of science and practice was noted by McClearn, Plomin, Gora-Maslak, and Crabbe (1991), who wrote that, despite the fact that many behavioral geneticists have a background in the social sciences, genetic perspectives on behavior have “…not yet completely woven into the pattern of psychological theory….” (p. 222).