Kocsor, F. – Juhász, Sz. – Rezneki, R. – Bereczkei, T.

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Presentation transcript:

Preference for self-resembling faces in human mate choice and interpersonal relations Kocsor, F. – Juhász, Sz. – Rezneki, R. – Bereczkei, T. University of Pécs, Hungary Department of General and Evolutionary Psychology 2019.02.25.

Facial cues influencing attractiveness Symmetry Averageness Masculinity/feminity Self-resemblance (Bereczkei et al 2003, 2004, Gyuris 2003, DeBruine, 2002, 2004) 2019.02.25.

Effects of self-resemblance on attractiveness reduces attractiveness of opposite sex faces (inbreeding avoidance), increases attractiveness of same-sex faces (affiliation toward kin) (Lisa deBruine 2004) increases attractiveness of opposite sex faces; Physical, cultural and psychological symilarity of spouses are greater (Bereczkei et al. 2003, 2004) Contradiction to be solved 2019.02.25.

Objectives Reveal the effect of self-resemblance on attractiveness sexual / non-sexual context 2019.02.25.

Methods Photos were taken of 150 volunteers Average (composite) faces were made 2019.02.25.

Average faces 2019.02.25.

Making morphs Marking of characteristic lines of the individual faces 2019.02.25.

Average faces Individual face 2 individuals Individual face Férfi+nő átlagképek ide Individual face 2 individuals Individual face 2019.02.25.

Average faces Férfi+nő átlagképek ide 4 individuals 2019.02.25.

Average faces Férfi+nő átlagképek ide 8 individuals 2019.02.25.

Male and female average faces made of 8 individuals 2019.02.25.

Making warps Individual face Average face 2019.02.25.

Warped to 10 % 2019.02.25.

Warped to 20 % 2019.02.25.

Warped to 30 % 2019.02.25.

Warped to 40 % 2019.02.25.

Warped to 50 % 2019.02.25.

Warped to 60 % 2019.02.25.

Warped to 70 % 2019.02.25.

Warped to 80 % 2019.02.25.

Warped to 90 % 2019.02.25.

Warped to 100 % 2019.02.25.

Average faces Warped to 60 % Individual face 2019.02.25.

Preliminary study and evaluation of warps Below 60 % there was no self-recognition Above 60 % faces become distorted All 60 % warps were evaluated by independent judges, in terms of attractiveness 2019.02.25.

Design of experiment 2019.02.25.

Other-resembling faces matched by attractiveness Male participants – opposite sex faces Self-resembling face Other-resembling faces matched by attractiveness 2019.02.25.

Other-resembling faces matched by attractiveness Male participants – same sex faces Self-resembling face Other-resembling faces matched by attractiveness 2019.02.25.

Other-resembling faces matched by attractiveness Female participants – same sex faces Self-resembling face Other-resembling faces matched by attractiveness 2019.02.25.

Other-resembling faces matched by attractiveness Female participants – opposite sex faces Self-resembling face Other-resembling faces matched by attractiveness 2019.02.25.

Results Other sex images Only men showed significant preference for self-resemblance Same sex images Neither men nor women showed preference for self-resemblance Lack of preference or effect of sample size? 2019.02.25.

Conclusions Men prefer self-resembling women Women do not prefer self-resembling men, or draw their attention to other traits in potential long term partner Homogamy is not an artefact caused by familiarity but specific psychological mechanism evolved for mate choice 2019.02.25.

Mechanism of homogamous mate choice Phenotype matching Sexual imprinting on the opposite-sex parent 2019.02.25.

References Bereczkei T. et al. (2003): Homogámia, genetikus hasonlóság, imprinting Magyar Pszichológiai Szemle 4 Bereczkei T., Gyuris P., Weisfeld, G. E. (2004): Sexual imprinting in human mate choice Proc. Royal Soc. Lond. B 271 DeBruine, L. M. (2002): Facial resemblance enhances trust Proc. Royal Soc. Lond. B 269 DeBruine, L. M. (2004): Facial Resemblace affect behaviour and attributions Hamilton, Ontario, McMaster University DeBruine, L. M: et al. (2005): Women's attractiveness judgments of self-resembling faces change across the menstrual cycle Hormones and Behavior, Volume 47, Issue 4, April 2005, Pages 379-383 Gyuris, P. (2003) Homogamy, imprinting, evolution: mate choice of women and men rearing in various family environments. PhD thesis, University of Pécs, Hungary. [In Hungarian.] 2019.02.25.

Thank you for your attention! Evolutionary Psychology Research Group of Pécs www.evolutionpsychology.com www.bereczkei.hu 2019.02.25.