M Kandrik, CL Fincher, BC Jones & LM DeBruine (2013). Menís, but not womenís, sociosexual orientation predicts couplesí perceptions of sexually dimorphic cues in own-sex faces. Human Behavior and Evolution Society in Miami, Florida, USA. July 2013.

Previous research suggests that perceptions of own-sex individuals can change according to within-subject variation (e.g., cyclic shifts) in their romantic partnersí sexual strategies. However, little is known about how more stable, between-subjects differences in partnersí sexual strategies predict perceptions of own-sex individuals. The revised Sociosexual Orientation Inventory (SOI-R) assesses individualsí openness to uncommitted sexual relationships and shows high test-retest reliability over long periods of time. We tested whether the SOI-R scores of men and women in romantic couples predicted their perceptions of own-sex faces. Menís, but not womenís, SOI-R was positively correlated with the extent to which both partners ascribed high dominance and attractiveness to own-sex faces with exaggerated sex-typical cues (i.e., masculine men and feminine women). These findings suggest that both menís and womenís perceptions of potential competitors for mates are sensitive to the male partnerís sexual strategy, potentially benefiting menís ability to compete for extra-pair and/or replacement mates and womenís mate guarding behaviors.

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