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Abstract
Women vary with respect to monogamous/polyandrous inclinations, as indexed by the Sociosexual Orientation Inventory (SOI). Possible sources of SOI variation include variation in perceptions relating to the utility of different mating tactics and variation in one's degree of masculinity/femininity, among other things. In three studies with undergraduate participants SOI, an index of self-perceived attractiveness and two measures of masculinization, namely scores on the Vandenberg Mental Rotation test (V-MRT) and 2D:4D digit ratios, were measured. Self-perceived attractiveness predicted SOI in the first study, but not in the second study. Right 2D:4D did predict SOI in the second study. In the third study, both self-perceived attractiveness and right 2D:4D predicted SOI, and so did V-MRT scores. However, the strongest single predictor of SOI in Study 3 was the reported amount spent on alcohol during the average month.
