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Learning curves showing number of arm entries required by females and males to collect all food pellets on a trial. Data represent group means ± sem for each block of training. *, Ovx females differed significantly from both intact and Ovx+E groups (P < 0.05); ¢¢, castrated, testosterone-treated (Cast+T) males differed significantly from gonadally intact controls (P < 0.02 by comparison of marginal group means).
