ABSTRACT
BEHAVIOR GENETIC S i s rapidl y gainin g acceptanc e a s a substantiv e disciplin e wi th in psychology . I n th e 196 5 Annual Review of Psychology, Bel l ob -served tha t "th e burgeonin g an d productiv e fiel d o f behavio r genetic s i n animals hardl y seem s i n nee d o f advocacy " (p . 3) . I n th e 196 6 Annual Review,
McClearn an d Meredit h called th e growt h "explosive. " Th e directio n of growt h
of thi s vigorou s infan t i s alread y a matte r o f concer n an d controversy . Fo r ex -
ample, Caspar i (1963 ) comment s tha t th e mos t direc t approac h t o behavio r b y
genetic mean s w i l l "no t tur n ou t t o b e ver y promising. " He i s referrin g t o th e
establishment o f difference s i n behaviora l characteristic s betwee n strain s o r sub -
lines an d subsequen t analysi s o f thei r geneti c behavio r i n crosses , a commo n
paradigm o f behavior genetic s studies .
