bims-chumac Biomed News
on Context effects on human mate choice
Issue of 2021–12–12
six papers selected by
Thomas Krichel, Open Library Society



  1. Iperception. 2021 Nov;12(6): 20416695211058799
      The present study aims to explore the influence of masculine/feminine changes on the attractiveness evaluation of one's own face, and examine the relationship of this attractiveness evaluation and the similarities between masculine/feminine faces and original faces. A picture was taken from each participant and considered as his or her original self-face, and a male or female face with an average attractiveness score was adopted as the original other face. Masculinized and feminized transformations of the original faces (self-face, male other face, and female other face) into 100% masculine and feminine faces were produced with morphing software stepping by 2%. Thirty female participants and 30 male participants were asked to complete three tasks, i.e., to "like" or "not like" the original face judgment of a given face compared to the original face, to choose the most attractive face from a morphed facial clip, and to subjectively evaluate the attractiveness and similarity of morphed faces. The results revealed that the acceptable range of masculine/feminine transformation for self-faces was narrower than that for other faces. Furthermore, the attractiveness ratings for masculinized or femininized self-faces were correlated with the similarity scores of the faces with the original self-faces. These findings suggested that attractiveness enhancement of self-face through masculinity/femininity must be within reasonable extent and take into account the similarity between the modified faces and the original self-face.
    Keywords:  attractiveness; self-face; sexual dimorphism; similarity
    DOI:  https://doi.org/10.1177/20416695211058799
  2. Neuropsychologia. 2021 Dec 07. pii: S0028-3932(21)00365-1. [Epub ahead of print] 108112
      Although mate choice is crucial for adults, its neural basis remains elusive. In the current study, we combined the functional near-infrared spectroscopy (fNIRS)-based hyperscanning and speed-dating to investigate the inter-brain mechanism of mate choice. Each participant was paired with two opposite-sex partners (participants) in separate speed-dating sessions and was asked to decide whether to engage in a further relationship with the paired partner after each session. The physical attraction of the daters was rated by their partners at the beginning of the dating whereas the social attraction was rated after the dating. Interpersonal neural synchronization (INS) at the dorsolateral prefrontal cortex during speed-dating rather than reading task predicts the outcome of mate choice. Moreover, social attraction rather than physical attraction affects INS during speed-dating. These findings demonstrate for the first time that INS predicts the outcome of mate choice of interacting daters in ecologically valid settings during their initial romantic encounter.
    Keywords:  Hyperscanning; Physical attraction; Social attraction; Social interaction; Speed-dating
    DOI:  https://doi.org/10.1016/j.neuropsychologia.2021.108112
  3. Biol Psychol. 2021 Dec 02. pii: S0301-0511(21)00230-1. [Epub ahead of print] 108237
      Androstenol has been reported to influence judgements of attractiveness and to affect participants' mood. In the present study, participants were asked to sniff androstenol or a control odour (pure ethanol) unilaterally with the left or right nostril. Subsequently, they rated the attractiveness of photographs of the opposite sex and their own feelings on four mood scales. Participants rated the photographs as significantly more attractive after sniffing androstenol compared with the control odour. This did not depend upon androstenol being perceived as pleasant. Androstenol made male participants feel more lively, and both male and female participants more sexy, when sniffed through the right compared with the left nostril. Participants rated themselves as more irritable and aggressive when exposed to androstenol through the left nostril. The findings are discussed in relation to the effects of arousal on attraction and in the context of current theories of hemispheric differences in emotion.
    Keywords:  Androstenes; Androstenol; Attractiveness; Cerebral lateralisation; Olfaction
    DOI:  https://doi.org/10.1016/j.biopsycho.2021.108237
  4. Psychol Rep. 2021 Dec 07. 332941211057144
      Research on monetary decisions and behaviors in dating relationships is very limited. The purpose of this study was to examine college students' current practice and expectations for date payment for first and subsequent romantic dates in the framework of gender role theory. A sample of 552 heterosexual college students took an online survey that included questions about their actual and expected payment for their first and subsequent dates. Participants also completed several measures regarding their gender roles. The findings indicated that traditional gender norms in dating continue to be popular in the new millennium because in actual practice, men almost always paid the whole bill of the first dates and paid more for subsequent dates. When asked who should pay for the dates, participants also expected men to pay more for first and subsequent dates. Women did show some willingness to share date expenses, although nowhere close to be completely even. The findings also indicated that gender role attitudes played little role in actual practice but had a stronger role in date payment expectations, showing that individuals subscribing to traditional gender inequality views tended to believe that men should pay more for dates.
    Keywords:  Sex; date payment; gender attitudes; gender norm; gender role
    DOI:  https://doi.org/10.1177/00332941211057144
  5. Child Care Health Dev. 2021 Dec 06.
       BACKGROUND: This qualitative study explored the dating and sexual health attitudes and behaviors among adolescents with severe obesity (BMI >99th %) attending a multidisciplinary weight-management program.
    METHODS: Semi-structured interviews were conducted with 19 participants (12 females, 7 males; Mage =16.8) and analyzed through reflective thematic analysis.
    RESULTS: Participants described polarized dating behaviours in which dating and sexual relationships were either avoided due this not being a priority, lack of time, feared rejection, and/or body size as perceived barrier or in contrast, when approached, involved greater sexual risk.
    CONCLUSIONS: These findings have numerous implications including the need for increased education on the romantic developmental challenges faced by adolescents with severe obesity, the importance of ongoing screening of high-risk sexual behaviours and body dissatisfaction from frontline care providers, and the ability to support referrals to psychosocial services when appropriate.
    Keywords:  adolescence; dating; obesity; relationship; romantic development; sex
    DOI:  https://doi.org/10.1111/cch.12940
  6. J Biosoc Sci. 2021 Dec 10. 1-9
      This research studied the preferences reported by women and men about their Ideal Body Image for the Opposite Sex (IBIOS), and its association with body mass index (BMI). It also analysed the preferences of each sex for a woman's ideal body image (W-IBI) and a man's ideal body image (M-IBI). A total of 450 participants aged 18-70 years with different weights were studied. Their IBIOS was assessed using standard figural stimuli. The sample was divided in four groups by sex and age (<45 years; ≥45 years). Sex and age differences in IBIOS, as well as sex differences in the preferences for a woman's ideal body image (W-IBI) and a man's ideal body image (M-IBI), were tested using a non-parametric Mann-Whitney U test. The association between IBIOS and BMI was analysed using Spearman's correlation. In all groups, the most chosen silhouette as IBIOS was number 4. In the under-45 years group, women chose bigger silhouettes for the opposite sex than men did (p<0.05). In this age group women chose as ideal smaller silhouettes for the female body than men did (p<0.01). In addition, women and men in the younger age group and with normal weight chose smaller silhouettes, while those who were overweight or obese selected larger silhouettes (p<0.001). Age was found to be a relevant factor in IBIOS preferences, and in the association between IBIOS and nutritional status as measured by BMI, which was only observed to be significant in the younger age group.
    Keywords:  Body image; Nutritional status; Sex
    DOI:  https://doi.org/10.1017/S0021932021000705