BEHAVIORAL GENETICS Matt McGue and Irving I. Gottesman Department of Psychology University of Minnesota Correspondence: Matt McGue Department of Psychology/Elliott Hall University of Minnesota Minneapolis, MN 55455 USA Voice: 1.612.626.2079 FAX: 1.612.626.2079 E-mail: mcgue001@umn.edu Submitted: Wiley-Blackwell Encyclopedia of Clinical Psychology Abstract length of 166 words; Manuscript length: 4599 words and 18 pages; 2 figures, 1 table, 24 references, and 3 recommended readings ABSTRACT