Supplementary material from "Sex-specific but not sexually explicit: pupillary responses to dressed and naked adults"

To address this question, this study compared pupillary responses of heterosexual men and women to naked and dressed portraits of male and female adult film actors. Pupillary responses corresponded with observers' self-reported sexual orientation, such that dilation occurred during the viewing of opposite-sex people, but were comparable for naked and dressed targets.

These findings indicate that pupillary responses provide a sex-specific measure, but are not sensitive to sexually explicit content.