bims-chumac Biomed News
on Context effects on human mate choice
Issue of 2023–07–16
five papers selected by
Thomas Krichel, Open Library Society



  1. Evol Psychol. 2023 Jul-Sep;21(3):21(3): 14747049231186119
      Although decades of research have identified facial features relating to people's evaluations of faces, specific features have largely been examined in isolation from each other. Recent work shows that considering the relative importance of these features in face evaluations is important to test theoretical assumptions of impression formation. Here, we examined how two facial features of evolutionary interest, facial attractiveness and facial-width-to-height ratio (FWHR), relate to evaluations of faces across two cultures. Because face evaluations are typically directly measured via self-reports, we also examined whether these features exert differential effects on both direct and indirect face evaluations. Evaluations of standardized photos naturally varying in facial attractiveness and FWHR were collected using the Affect Misattribution Procedure in the United States and Turkey. When their relative contributions were considered in the same model, facial attractiveness, but not FWHR, related to face evaluations across cultures. This positive attractiveness effect was stronger for direct versus indirect evaluations across cultures. These findings highlight the importance of considering the relative contributions of facial features to evaluations across cultures and suggest a culturally invariant role of attractiveness when intentionally evaluating faces.
    Keywords:  affect misattribution procedure; cross-cultural effects; face perception; facial attractiveness; facial width-to-height ratio
    DOI:  https://doi.org/10.1177/14747049231186119
  2. Proc Biol Sci. 2023 Jul 26. 290(2003): 20231513
    Kathryn V Walter, Daniel Conroy-Beam, David M Buss, Kelly Asao, Agnieszka Sorokowska, Piotr Sorokowski, Toivo Aavik, Grace Akello, Mohammad Madallh Alhabahba, Charlotte Alm, Naumana Amjad, Afifa Anjum, Chiemezie S Atama, Derya Atamtürk Duyar, Richard Ayebare, Carlota Batres, Mons Bendixen, Aicha Bensafia, Boris Bizumic, Mahmoud Boussena, Marina Butovskaya, Seda Can, Katarzyna Cantarero, Antonin Carrier, Hakan Cetinkaya, Ilona Croy, Rosa María Cueto, Marcin Czub, Daria Dronova, Seda Dural, Izzet Duyar, Berna Ertugrul, Agustín Espinosa, Ignacio Estevan, Carla Sofia Esteves, Luxi Fang, Tomasz Frackowiak, Jorge Contreras Garduño, Karina Ugalde González, Farida Guemaz, Petra Gyuris, Mária Halamová, Iskra Herak, Marina Horvat, Ivana Hromatko, Chin-Ming Hui, Jas Laile Jaafar, Feng Jiang, Konstantinos Kafetsios, Tina Kavčič, Leif Edward Ottesen Kennair, Nicolas Kervyn, Truong Thi Khanh Ha, Imran Ahmed Khilji, Nils C Köbis, Hoang Moc Lan, András Láng, Georgina R Lennard, Ernesto León, Torun Lindholm, Trinh Thi Linh, Giulia Lopez, Nguyen Van Luot, Alvaro Mailhos, Zoi Manesi, Rocio Martinez, Sarah L McKerchar, Norbert Meskó, Girishwar Misra, Conal Monaghan, Emanuel C Mora, Alba Moya-Garófano, Bojan Musil, Jean Carlos Natividade, Agnieszka Niemczyk, George Nizharadze, Elisabeth Oberzaucher, Anna Oleszkiewicz, Mohd Sofian Omar-Fauzee, Ike E Onyishi, Baris Özener, Ariela Francesca Pagani, Vilmante Pakalniskiene, Miriam Parise, Farid Pazhoohi, Annette Pisanski, Katarzyna Pisanski, Edna Ponciano, Camelia Popa, Pavol Prokop, Muhammad Rizwan, Mario Sainz, Svjetlana Salkičević, Ruta Sargautyte, Ivan Sarmány-Schuller, Susanne Schmehl, Shivantika Sharad, Razi Sultan Siddiqui, Franco Simonetti, Stanislava Yordanova Stoyanova, Meri Tadinac, Marco Antonio Correa Varella, Christin-Melanie Vauclair, Luis Diego Vega, Dwi Ajeng Widarini, Gyesook Yoo, Marta Marta Zaťková, Maja Zupančič.
      
    DOI:  https://doi.org/10.1098/rspb.2023.1513
  3. Proc Biol Sci. 2023 07 12. 290(2002): 20231061
      Bateman's principles heavily influence the understanding of human reproductive behaviour. Yet, few rigorous studies on Bateman's principles in contemporary industrialized populations exist. Most studies use small samples, exclude non-marital unions, and disregard recent insights on within-population heterogeneity in mating strategies. We assess mating success and reproductive success using population-wide Finnish register data on marital and non-marital cohabitations and fertility. We examine variability across social strata in the Bateman principles and analyse the mate count, the cumulated duration with a mate, and the association with reproductive success. Results support Bateman's first and second principles. Regarding Bateman's third principle, the number of mates is more positively associated with reproductive success for men than women, but this association is driven by ever having a mate. Having more than one mate is on average associated with lower reproductive success. However, for men in the lowest income quartile, having more than one mate positively predicts reproductive success. Longer union duration is associated with higher reproductive success, and more so for men. We note that sex differences in the relationship between mating success and reproductive success differ by social strata, and argue that mate duration may be an important component of mating success alongside mate count.
    Keywords:  Bateman gradient; cohabitation; evolutionary demography; fertility; serial monogamy; sexual selection
    DOI:  https://doi.org/10.1098/rspb.2023.1061
  4. J Interpers Violence. 2023 Jul 10. 8862605231182378
      The current research examined how contextual factors-the quantity of alcohol consumed by each partner, and whether this quantity matched-influenced how alcohol-fueled sexual encounters were perceived with regard to consent, coercion, sexual assault, and perceived responsibility of the focal partner for the outcome of the encounter. Across four studies (Ntotal = 535), participants read vignettes in which one person described a sexual encounter they had following a night out drinking. These scenarios differed within studies as a function of quantified alcohol consumed (1 shot; 15 shots) and whether both people in the vignettes consumed the same amount of alcohol (matched; unmatched). They also differed between studies as a function of whether the couples described were mixed gender or same gender. Across all four studies, scenarios in which both people in the scenario consumed different quantities of alcohol (i.e., 15 vs. 1 shot) were seen as less consensual, more coercive, and more likely to be an assault compared to scenarios where consumption was matched, especially at lower levels of intoxication (i.e., 1 shot each vs. 15 shots each). However, focal partners were also seen as less responsible for the outcome of the interaction when levels of intoxication were unmatched compared to matched. This pattern replicated across scenarios depicting same-gender and mixed-gender couples. These findings suggest that people prioritize information regarding whether sexual partners are "matched" or "unmatched" in terms of their intoxication when evaluating whether ambiguous sexual encounters are consensual and perceived individual responsibility.
    Keywords:  alcohol; consent; gender; sexual assault; sexual minority orientations
    DOI:  https://doi.org/10.1177/08862605231182378
  5. J Interpers Violence. 2023 Jul 11. 8862605231185301
      Forced or coerced sexual experiences have serious consequences for young people's health and well-being. Healthy sexual consent communication can foster positive intimate relationships and help prevent unwanted sexual experiences. We aimed to explore how young people in Nairobi's informal settlements construct, communicate, and negotiate sexual consent within heterosexual partnerships, given the limited insight into such experiences from resource-poor, global-south contexts. A qualitative study with young men and women aged 15 to 21 years was conducted among former participants of a school-based sexual violence prevention intervention in four informal settlements (slums) of Nairobi. Twenty-one individual in-depth interviews (n = 10 females, n = 11 males) and 10 focus group discussions (five with n = 6-11 males vs. females, respectively), that is, n = 89 in total were conducted. Data were analysed using thematic network analysis and interpreted using the Sexual script theory. Participants' endorsement of incongruent sexual scripts shaped their perceptions and negotiations of sexual consent. Young men were committed to respecting sexual consent, but promoted male (sexual) dominance, and perceived women's refusals as token resistance. Per traditional scripts of sexual chastity, young women were largely bound by their use of a "soft no" to give consent, so as to not display direct sexual interest. Actual non-assertive refusals thus risked being interpreted as consent. Young women's "actual" refusals had to be more assertive (saying a "hard no") and were described as having been influenced by skills learned during the school-based intervention. Findings highlight the need for sexual consent education to address internalized gendered norms about female token resistance, destigmatize female sexuality, reduce male dominance norms, and encourage young people's respect for both assertive and non-assertive sexual consent communication.
    Keywords:  adolescent victims; adolescents; prevention; sexual assault; sexual harassment
    DOI:  https://doi.org/10.1177/08862605231185301