Abstract:
:The sex ratio of the local population influences mating-related behaviours in many species. Recent experiments show that male-biased sex ratios increase the amount of financial resources men will invest in potential mates, suggesting that sex ratios influence allocation of mating effort in humans. To investigate this issue further, we tested for effects of cues to the sex ratio of the local population on the motivational salience of attractiveness in own-sex and opposite-sex faces. We did this using an effort-based key-press task, in which the motivational salience of facial attractiveness was assessed in samples of faces in which the ratio of male to female images was manipulated. The motivational salience of attractive opposite-sex, but not own-sex, faces was greater in the own-sex-biased (high competition for mates) than in the opposite-sex-biased (low competition for mates) condition. Moreover, this effect was not modulated by participant sex. These results present new evidence that sex ratio influences human mating-related behaviours. They also present the first evidence that the perceived sex ratio of the local population may modulate allocation of mating effort in women, as well as men.
journal_name
Biol Lettjournal_title
Biology lettersauthors
Hahn AC,Fisher CI,DeBruine LM,Jones BCdoi
10.1098/rsbl.2014.0148subject
Has Abstractpub_date
2014-06-01 00:00:00issue
6eissn
1744-9561issn
1744-957Xpii
rsbl.2014.0148journal_volume
10pub_type
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