Here we show positive relationships between testosterone, facial attractiveness and immune function (antibody response to a hepatitis B vaccine) in human males, and present some preliminary evidence that these relationships are moderated by naturally co-occurring cortisol (a glucocorticoid stress hormone involved in the fight-or-flight response).
2013年 フィンランドのトゥルク大学(University of Turku)の研究を紹介します。女性の顔面の魅力度は免疫反応性と関連がなかった一方で、ストレスホルモンであるコルチゾール値と体脂肪率と関連していることを発見しました。
Our study suggests that in contrast to men, facial attractiveness in women does not indicate immune responsiveness against hepatitis B, but is associated with two other aspects of long-term health and fertility: circulating levels of the stress hormone cortisol and percentage body fat.
Since fluctuating asymmetry, a measure of developmental stability, is known to be a valid cue for fitness in several biological domains, we scrutinized facial asymmetry as a potential mediator between attractiveness and fitness.
The more symmetric twin of a pair was consistently rated as more attractive, and the magnitude of the difference between twins in perceived attractiveness was directly related to the magnitude of the difference in symmetry.
Inbreeding, parasites and/or physical conditions may play a causal role in variation in fluctuating asymmetry within and between populations of P. japonica.
Findings from both adult and infant research suggest that there may be a universal standard of attractiveness, that of averageness. They then speculate about the mechanisms that could account for the development of attractiveness preferences and for the surprising fact that even young infants seem to recognize attractiveness in faces.
This conception of attractiveness judgments integrates a wide range of data, including findings concerning the effect of average facial features on attractiveness judgments, the relations between averageness of features and protein heterozygosity, and the role of heterozygosity as a defense against parasites.
Attractiveness and dominant appearance accounted for variance in sexual experience beyond that explained by pubertal development, with dominance being the better predictor of the two.
Baed on research indicating single males have higher testosterone levels than partnered males and that higher testosterone levels are associated with stronger smelling BO, the current study aimed to determine if, by extension of previous findings, single males’ BO smells stronger than partnered males’ BO.
Consistent with the hypothesis, single men’s BO smelled stronger than partnered men’s BO and single men’s faces were rated as more masculine than partnered men’s faces.
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