Relationship between facial attractiveness and pupil diameter in young adults

Silvana Queiroga da Costa Carvalho, Michael Jackson Oliveira de Andrade, Natanael Antonio dos Santos


The objective of this study was to investigate whether there is a relationship between pupil diameter and facial attractiveness. Participated in the study 60 young adults (30 men and 30 women) between 18 and 26 years of age (M = 20.65, SD = 2.20). Ten different unfamiliar neutral faces (five men and five women) were used as stimuli. The pupil diameter of each face was manipulated with pupil diameters of 2, 3, 4, 5 and 6 mm (10 faces x 5 pupil diameters = 50stimuli). A two-step study was carried out with the same sample and the same sets of faces, seeking to understand the difference of responses between subjects of both sexes. In phase I, result indicated a significant difference in relation to the pupil diameter factor for both the men (ꭓ² = 21.93, p < .05) and the women (ꭓ² = 44.73, p < .05). In phase II, the results indicated significant differences in relation to the pupil size [F (1, 234) = 19.06, p < 0.05]. The post-hoc Tukey HSD test showed that both the men and the women differently judged the faces with a pupil diameter of 2 mm in relation to the faces with pupil diameters of 3, 4, 5 and 6 mm (p < .05). Also, a significant difference between the diameter of 5 mm in relation to the diameter of 3 mm (p < .05). In general, the results indicate that the pupil diameter is a structural component of the human face that plays an important role in the process of judging facial attractiveness.

***Relação entre a atratividade facial e diâmetro pupilar em adultos jovens***

O objetivo deste estudo foi investigar a relação entre o diâmetro da pupila e a atratividade facial. Participaram da pesquisa 60 jovens com idade entre 18 e 26 anos. Foram utilizadas dez faces de adultos jovens, manipulou-se o diâmetro de cada pupila com variações de 2, 3, 4, 5 e 6 mm. Realizou-se um estudo em duas etapas: na fase I, o resultado indicou diferença significativa para o fator de diâmetro pupilar tanto para homens quanto para mulheres (p < 0,05). Na fase II, os resultados indicaram diferenças significativas em relação ao tamanho da pupila (p < 0,05). O teste post-hoc Tukey mostrou que tanto os homens quanto as mulheres avaliaram diferentemente as faces com diâmetro pupilar de 2 mm (p < 0,05). Em geral, os resultados indicam que o diâmetro da pupila é um componente da face humana que desempenha um importante função no processo de julgamento da atratividade facial.


diâmetro da pupila; atratividade facial; adultos jovens.

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