Evolutionary Psychology最新文献

An increasing number of people are single, meaning that they do not have an intimate partner. Existing research has focused on identifying the difficulties that people face in attracting mates. In the present paper, we propose that another factor contributing to singlehood is experiencing difficulties in maintaining intimate relationships. By analyzing data collected from 1099 Greek-speaking participants, we found that individuals who experienced greater difficulties maintaining intimate relationships were more likely to be either between-relationships single or voluntarily single rather than in an intimate relationship. For women specifically, higher scores in this dimension were also associated with a greater probability of being in an intimate relationship than being involuntarily single. Additionally, we found that the association between difficulties in maintaining an intimate relationship and relationship status was linear for men-the relationship between the two variables can be pictured as straight line-but curvilinear-the relationship can be pictured as an inverted U-shaped curve-for women.

Frequently, people find themselves in a situation where an intimate relationship they wish to keep ends, creating emotional pain that requires coping strategies. The aim of the present study is to investigate the various strategies people employ for this purpose. Using a mixed-methods approach, we identified 84 distinct acts, which we classified into 16 strategies and subsequently classified into five main strategies for coping with the end of a desirable intimate relationship. The most likely to be used main strategy was "Transfer focus to different things," including strategies such as "Focus on myself" and "Keep myself busy." Other commonly chosen main strategies were "Seek support," involving reliance on friends, family, and professionals, and "Social withdrawal," characterized by isolation behaviors. Additionally, several participants indicated readiness to adopt the "Disassociation and positive reframing" main strategy, involving attempts to positively reframe the end of the relationship and disassociate from the former partner. The least frequently adopted main strategy was "Sex and substances," involving substance use (such as alcohol) and casual sex encounters to cope with the end of a relationship. Furthermore, significant main effects of sex and age were observed for several of the identified strategies.

Developmental environments shape attachment styles and life history (LH) patterns, both of which predict romantic relationship outcomes. However, the ways in which attachment styles interact with LH dimensions-specifically, mating effort and parenting effort-and how these relationships predict romantic relationship outcomes remain unclear. The current study investigated how these factors predict relationship satisfaction and conflict in a sample of Polish adults (N = 332, Mage = 39 years, SD = 9.10). We hypothesized that mating and parenting efforts would mediate the relationship between developmental environments and relationship outcomes independently from attachment style. Results supported this hypothesis for mating effort but not for parenting effort. Additionally, the current study found little support for a connection between mating/parenting effort and attachment styles and indicated that LH can be influenced by a broader range of early developmental experiences than attachment. The results imply that although both mating effort/parenting effort and attachment styles are affected by early environments and can predict the same relationship outcomes, the developmental processes through which they operate may differ. The implications of the obtained results are discussed.

Research suggests that physical attractiveness may be associated with more permissive moral norms, which can in turn lead to the adoption of a more liberal sexual strategy. However, different predictions arise from evolutionary Life History Theory and Moral Foundations Theory. We hypothesized that self-reported physical attractiveness and moral intuitions (innate morality) mediate the relationship between somatic-parental effort (SPE) and sociosexual desire - an indicator of mating orientation. The study involved 326 women aged 19-33 years. A sequential mediation analysis was conducted. As hypothesized, higher levels of SPE were associated with higher self-reported physical attractiveness. It was also shown that self-perceived physical attractiveness was a positive indicator of innate morality and that among all moral intuitions only Authority was a negative predictor of a preference for short-term relationships. Furthermore, in the studied women SPE was a direct positive predictor only of the intuition of Sanctity/Purity. However, the relationship between physical attractiveness in women following the slow reproductive strategy and sociosexual desire was characteristic of reproductive effort rather than somatic-parental effort. However, it was found that certain relationships between variables were in particular characteristic of women with a rural background. For this reason, the obtained results in the hypothesis context are significantly limited to this specific subpopulation of women.

We investigated how paternity uncertainty (PU) shapes perceptions of familial kindness. We predicted that relatives with lower PU would be rated as kinder than those with higher PU. A total of 9,128 participants rated the kindness of specific relatives in their families. Main analyses focused on parents and maternal/paternal grandparents, who differ in their typical levels of PU. Siblings were included for broader within-family comparisons, while step-relatives, all having identical (maximal) PU, served as negative controls. Controlling for sex, age, and random effects of raters and targets, results supported PU predictions: PU showed a negative correlation with rated kindness (β = -0.148, t_(31,910) = -6.23, p < 0.001, with the full model (including PU) significantly outperforming a reduced model (χ²₍₂₎ = 42.84, p < 0.001). Post-hoc tests revealed significant differences between adjacent PU levels (0 vs. 1: p < 0.001, d = 0.15; 1 vs. 2: p = 0.0002, d = 0.08). Mothers and maternal grandmothers (no PU) were rated the kindest, while the paternal grandfather (two PU) was rated lowest. Daughters consistently rated their biological parents higher than sons, possibly reflecting lower PU through female offspring. Maternal grandfathers were rated kinder than fathers, despite identical PU, perhaps due to redirected investment by non-reproducing elders. Furthermore, mothers were rated kinder than maternal grandmothers, possibly due to "insider knowledge" of their children's paternity. Step-relatives showed minimal variation, suggesting that observed differences among biological kin reflect genetic relatedness and PU, rather than non-genetic factors. Overall, our findings support kin selection theory and suggest that paternity uncertainty subtly yet systematically shapes perceptions of familial kindness.

Four studies investigated sex differences in children's motivation and action patterns for climbing playground structures and a gymnasium rock wall to assess any influence of ancestral sexual-size dimorphism limiting tree-climbing agility. Study 1 examined yearly incidences of children aged 3 to 13 falling from monkey bars and jungle gyms in a 1985-1989 National Electronic Injury Surveillance System dataset. Injury incidences of 3- to 6-year-old girls were lower than those of same-aged boys with the inverse occurring between ages 7 through 10 (p < 0.001). Study 2 determined that, during two recess periods in 13 elementary schools, 3.14% of enrolled girls were climbing playground structures compared with 1.45% of enrolled boys (p = 0.021) who were less inclined to climb as they aged. Study 3 showed that 6 to 8 year-old girls climbing alone perched longer (p = 0.0004) on 3 jungle gyms in a regional park longer than same-aged boys. Extended perching by girls might reflect their greater desire for surveillance useful historically for assessing danger. For Study 4, video recordings were made of the climbing actions of 28 children 7- to 12- years of age enrolled in an indoor rock-wall climbing class for beginners. Girls exhibited marked climbing differences (p = 0.005), with discriminant function analysis classifying 84.6% of girls correctly and 86.7% of boys correctly. While tree climbing was not studied directly, the sex differences shown in these studies indicates that girls are motivated to climb playground structures more than boys and climb rock walls using different action patterns.

Creativity offers both survival and reproductive benefits, being a desirable trait in potential mates and linked to fertility and sexuality. We investigated whether viewing attractive faces of potential short-term or long-term partners in a simulated dating portal enhances participants' creativity. We also explored possible mediators (arousal, mood, sexual arousal, motivation, and attraction) and moderators (relationship status, satisfaction, mate value, and sociosexual orientation). In Study 1, 483 participants (M_age = 30.06, SD = 6.37; 242 women, 241 men) viewed either four attractive or four unattractive opposite-sex potential partners and wrote self-promotional bios. No significant creativity differences were found between the attractive and unattractive groups. However, men were more flexible and produced more original ideas than women, while women showed greater fluency and self-creativity promotion. In Study 2, 494 participants (M_age = 30.84, SD = 6.06; 258 women, 236 men) viewed profiles of attractive potential partners for either short-term or long-term inclined relationships. Women's fluency and originality were higher in the long-term condition, but sexual arousal negatively impacted both fluency and originality when choosing an attractive partner for a long-term relationship, particularly when a real date desirability with the mate was high. Overall, the results suggest that creativity is influenced by the mating context, though the effects were modest. Future studies should increase sample sizes, geographic diversity, and experimental settings.

Life history theory suggests that individuals vary in their sexual, reproductive, parental, familial, and social behavior in response to the physical and social challenges encountered during development. So-called "sugar relationships" generally involve exchanges of resources for sex and/or companionship between a younger partner and an older provider. This research aimed to explore the relationship between openness to sugar relationships and life history strategy. A total of 312 participants (192 women, 120 men) completed an extensive online questionnaire, including scales such as the Acceptance of Sugar Relationships in Young Women and Men Scale, High-K Strategy Scale, Multidimensional Measure of Sociosexual Orientation, Family Resources Scale, Childhood Unpredictability Scale, and Perceived Vulnerability to Disease Scale. The results indicate that openness to sugar relationships is primarily associated with short-term mating orientation, while the role of life history strategy appears to be weaker than previously assumed. Importantly, the SEM analysis reveals an indirect link between limited family resources in childhood and openness to sugar relationships, mediated by a fast life history strategy. This pathway suggests that early environmental constraints may shape an adaptive orientation toward immediate resource acquisition in adult relationships. No such associations were observed among men, indicating sex-specific patterns. These findings provide insight into how specific life history strategies, particularly in women, may influence attitudes toward resource-based relationships, illustrating the nuanced interactions between early experiences, life history orientation, and adult relational preferences.

Intimate relationships frequently come to an end, and in the current research, we have endeavored to examine how individuals would potentially react in the scenario where their intimate partner decides to terminate a relationship they wish to continue. More specifically, employing open-ended questionnaires on a sample of 219 Greek-speaking participants, we identified 79 possible reactions. Subsequently, using close-ended questionnaires on a sample of 442 Greek-speaking participants, we categorized these reactions into 13 broad factors. Participants indicated that they were more likely to feel sadness, inquire of their departing partners why they wish to end the relationship, and attempt to divert their thoughts elsewhere to avoid dwelling on the end of the relationship. Men indicated a higher likelihood than women to seek revenge sex, although significant sex differences were not observed in other reactions. Furthermore, we classified these 13 factors into three broader domains. The highest-rated domain was "Accept and forget," followed by "Sadness and depression," and "Physical and psychological aggression." These findings could enable us to gain a better understanding of the process of relationship dissolution, and could potentially be employed to identify and prevent reactions that may have harmful repercussions for the individuals involved in the relationship.

Mating and labor markets are fundamental drivers of societal dynamics. Yet, equity of access to these domains differs between the sexes due to numerous biological, economic, psychological, and socio-cultural factors. These inequalities and their impacts can accentuate perceptions, preferences, and behaviors of males and females in different ways. Utilizing a large cross-sectional sample of those currently engaged in the Australian mating market (n = 1072 online daters), we explored the impact of sex and individual differences on the perceptions of men's ease of access to a decent job in the labor market (opportunity), women's economic dependence on men (economic inequality), and relative reproductive opportunity (dating access) for both sexes. Our study identifies both sex differences and symmetries in socio-economic factors (such as education level and having offspring) correlating with the perceptions of both economic and dating market access for Australian online daters. Additionally, key resource endowment indicators (income and unemployment) also reflect differences in both sexes' perceptions of both access and gender equity. That said, our study finds that perceptions of access to both (economic and mating) markets shows far greater variation based on biological age (especially for women) than any other factor.