The self-reported use of sexual fantasy as an aspect of sexual behavior in natural settings was examined with respect to genital responding to both sexual fantasy and an erotic audiotape within the laboratory. It was predicted that subjects who self-reported a higher frequency of using sexual fantasy during either masturbation or sexual interaction with a partner in extralaboratory settings would be more highly responsive on genital measures of sexual arousal obtained when the subject was generating sexual fantasy within the laboratory. Forty-five female subjects (median age, 21) completed a battery of questionnaires, which included three scales of general imagery ability and frequency, and a detailed sexual history. All subjects then experienced an initial nonstimulated baseline period followed by a second baseline period and an exposure to an erotic audiotape. Genital responding was measured by vaginal photoplethysmography. Those subjects who reported more frequent use of fantasy during masturbation outside the laboratory showed greater genital responses during both fantasy and tape-elicited arousal than those reporting less use of masturbatory fantasy. One of the imagery questionnaires yielded a significant correlation with genital response in the fantasy condition. It appears that cognitive factors have predictive significance for measures of vaginal pressure pulse responses to erotic tape recordings and fantasies.
