The current study assessed the sexual categorization of children among a random sample of adults from the general population. Twenty-seven males and 27 females (N = 54) were exposed to a categorization task that assessed their ability to discriminate adult- from child-related words and sexual from non-sexual words. Then, in a modified Implicit Association Test they were required to respond with a particular key press to individual child- and adult-related stimuli paired with either sexual or nonsexual stimuli. In another block of testing the pairs of stimuli requiring a common key response were juxtaposed. There was more effective acquisition of common response functions for child/nonsexual than for child/sexual stimulus pairs for all participants combined. This effect was also observed for female participants separately but not for males. These findings support the utility of behavior-analytic variations of the Implicit Association Test but raise important considerations regarding their use as forensic and diagnostic tools. (Contains 4 figures and 1 table.)