Evolution and Human Behavior最新文献

{"title":"Infrastructure of mother-infant interactions across development in chimpanzees (Pan troglodytes) in the wild","authors":"Bas van Boekholt,&nbsp;Simone Pika","doi":"10.1016/j.evolhumbehav.2025.106671","DOIUrl":"10.1016/j.evolhumbehav.2025.106671","url":null,"abstract":"<div><div>The infrastructure underlying human social interaction can be described by several characteristics, such as the exchange of signals and actions, specific temporal relationships, and the use of directed gaze and body direction. These characteristics are remarkably uniform across several different languages, cultures with some of them emerging in mother-infant interactions early in development before the onset of words. It has been suggested that distinct features underlying human social action might have preceded the evolution of language and are shared across the whole primate lineage. However, despite decades of research on nonhuman primate communication, our understanding of general characteristics underlying communicative interactions, and, more specifically, the role they play in the development of communication, remains surprisingly limited. Hence, here we aimed to gain a more comprehensive overview, by studying mother-infant interactions of one of our closest living relatives, the chimpanzee (<em>Pan troglodytes schweinfurthii</em>), living in their natural environments. Specifically, we addressed the following two research questions: 1) Which characteristics built the main infrastructure of mother-infant interactions? 2) Which factors influence the infrastructure of mother-infant interactions? To answer these questions, we observed communicative interactions of a total of 17 chimpanzee mother-infant dyads (0–5 years) in the Ngogo community, Kibale National Park, Uganda between February 2021 and February 2023 (<em>N</em> = 1295 observation hours). We specifically focused on four different contexts where interactions frequently occurred, food sharing, nursing, grooming and joint-travel, and investigated the role of demographic factors (age and sex of the infant, interactant class) and interactional factors (context, unit type, turn transition). The results showed that mother-infant interactions were characterized by an equally distributed exchange of signals and actions, showed response times ranging from zero to two seconds, and involved the establishment and maintenance of participation frameworks through high frequencies of directed gaze and body direction. There was little to no effect of age and sex of the infant, interactant class, unit type and turn transition on these characteristics. However, context had a strong influence with relative lower frequencies of signals, quicker response times, and lower frequencies of directed gaze and body direction observed in the joint-travel context. By taking a comparative developmental approach, this study highlights commonalities in the infrastructure of mother-infant interactions between humans and chimpanzees, which contribute to uncover how extinct humans might have socially interacted.</div></div>","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 2","pages":"Article 106671"},"PeriodicalIF":3.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating perceptions of fetal resemblance","authors":"Carlota Batres ,&nbsp;Amy Mullen ,&nbsp;Sonya Krofl ,&nbsp;Lauren Trainor","doi":"10.1016/j.evolhumbehav.2025.106670","DOIUrl":"10.1016/j.evolhumbehav.2025.106670","url":null,"abstract":"<div><div>Previous research has found that mothers are more likely to ascribe paternal resemblance to newborns. Moreover, studies have found that fathers who perceive that their children resemble them invest more in those children. In this study, we aimed to examine if maternal claims of paternal resemblance exist even with very limited visual information by asking parents whom they believed the fetus looked like during an ultrasound. We found that mothers, but not fathers, were more likely to say that the fetus resembled the father. Additionally, we found that women who were not married were even more likely to say that the fetus resembled the father. By claiming phenotypic similarity with the father, mothers are reducing paternity uncertainty and, consequently, securing investment for their offspring from when they are in utero.</div></div>","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 2","pages":"Article 106670"},"PeriodicalIF":3.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Live fast, die young, leave a good-looking offspring: longevity and reproduction trade-offs in rural Spain (1536–1965)","authors":"Francisco J. Marco-Gracia ,&nbsp;Ángel Luis González-Esteban","doi":"10.1016/j.evolhumbehav.2025.106673","DOIUrl":"10.1016/j.evolhumbehav.2025.106673","url":null,"abstract":"<div><div>One of the most debated evolutionary theories is the trade-off between fertility and longevity. Specifically, women who experience more childbirths may have a shorter lifespan due to reduced opportunities for their bodies to recover from the associated costs. Previous studies have produced varied results, largely due to the challenge of distinguishing evolutionary factors from genetic and environmental influences in human societies. Since both longevity and fertility patterns tend to be inherited across generations, long-term historical longitudinal population samples are particularly valuable for exploring this trade-off, as they not only provide large population samples across different temporal contexts but also allow for the control of intergenerational transmission of behavior. In this study, we use a sample of 5097 women from rural Spain (based on parish records from 17 villages) who died between the sixteenth and twenty-first centuries to investigate whether a trade-off between fertility and longevity has existed. In all cases, we can control for the experiences of their parents. Our findings reveal a substantial negative impact of parity on women's longevity, as well as the adverse effect of having an early birth before fertility control was established. Additionally, we observed a significant negative effect of a prolonged reproductive cycle on natural fertility.</div></div>","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 2","pages":"Article 106673"},"PeriodicalIF":3.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The function of love: A signaling-to-alternatives account of the commitment device hypothesis","authors":"Benjamin Gelbart ,&nbsp;Kathryn V. Walter ,&nbsp;Daniel Conroy-Beam ,&nbsp;Casey Estorque ,&nbsp;David M. Buss ,&nbsp;Kelly Asao ,&nbsp;Agnieszka Sorokowska ,&nbsp;Piotr Sorokowski ,&nbsp;Toivo Aavik ,&nbsp;Grace Akello ,&nbsp;Mohammad Madallh Alhabahba ,&nbsp;Charlotte Alm ,&nbsp;Naumana Amjad ,&nbsp;Afifa Anjum ,&nbsp;Chiemezie S. Atama ,&nbsp;Derya Atamtürk Duyar ,&nbsp;Carlota Batres ,&nbsp;Mons Bendixen ,&nbsp;Aicha Bensafia ,&nbsp;Boris Bizumic ,&nbsp;Maja Zupancic","doi":"10.1016/j.evolhumbehav.2025.106672","DOIUrl":"10.1016/j.evolhumbehav.2025.106672","url":null,"abstract":"<div><div>Love is commonly hypothesized to function as an evolved commitment device, disincentivizing the pursuit of romantic alternatives and signaling this motivational shift to a partner. Here, we test this possibility against a novel signaling-to-alternatives account, in which love instead operates by dissuading alternatives from pursuing oneself. Overall, we find stronger support for the latter account. In Studies 1 and 2, we find that partner quality relative to alternatives positively predicts feelings of love, and love fails to mitigate the negative effects of desirable alternatives on relationship satisfaction—contradicting the classic commitment device account. In Study 3, using a longitudinal design, we replicate these effects and find that changes in partner quality relative to alternatives predict changes in love over time. In Study 4, we replicate the relationship between love and relative partner quality across 44 countries. In Study 5, we find a nearly one-to-one correspondence between the extent to which partner-directed actions are diagnostic of love and reductions in romantic alternatives' attraction to the actor. These results suggest that love may not act as a commitment device in the classic sense by disincentivizing the pursuit of alternatives but by disincentivizing alternatives from pursuing oneself.</div></div>","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 2","pages":"Article 106672"},"PeriodicalIF":3.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of synchronous chanting and identity fusion on perceived ingroup formidability, outgroup threat, and parochial altruism among soccer fans","authors":"Tiago Bortolini ,&nbsp;Martha Newson ,&nbsp;Francisco Tovar-Moll ,&nbsp;Sofia Latgé-Tovar ,&nbsp;Harvey Whitehouse ,&nbsp;Jorge Moll ,&nbsp;Ronald Fischer","doi":"10.1016/j.evolhumbehav.2025.106666","DOIUrl":"10.1016/j.evolhumbehav.2025.106666","url":null,"abstract":"<div><div>Previous research indicates that social synchrony simultaneously increases ingroup bonding and prosociality, whilst also having the potential to make groups appear more formidable or threatening. However, many such studies have been carried out in artificial settings or in minimal groups which lack preexisting bonds or histories of prosocial action or intergroup rivalry. Here we investigate: 1) whether a synchronous display is perceived as more formidable by ingroups and outgroups, and more threatening by outgroups, in a real-world context involving football (soccer) fans; 2) whether these perceptions extend to behavioral decisions towards ingroups and outgroups; and 3) whether ‘identity fusion’ with the ingroup moderates these relationships. A sample of 771 Brazilian soccer fans took part in a pre-registered conceptual replication online study in which they randomly listened to either a synchronous or asynchronous soccer chant. Both ingroups and outgroups judged the synchronous stimuli to make the performers seem more formidable, but not more threatening. At the behavioral level, we found no effect for synchrony on pro-group behaviors or outgroup derogation, but there was a significant interaction indicating that highly ‘fused’ participants who perceived rival fans to be more threatening tended to engage in more outgroup hostility, even at a cost to self. These results parallel previous studies showing synchrony's effects on perceived ingroup formidability and provide novel insights into the role of social bonding and perceived outgroup threat as contributing factors in the evolution of intergroup conflict in real world situations.</div></div>","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 2","pages":"Article 106666"},"PeriodicalIF":3.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Why honor heroes? The emergence of extreme altruistic behavior as a by-product of praisers' self-promotion","authors":"Jean-Louis Dessalles","doi":"10.1016/j.evolhumbehav.2025.106656","DOIUrl":"10.1016/j.evolhumbehav.2025.106656","url":null,"abstract":"<div><div>Heroes are people who perform costly altruistic acts. Few people turn out to be heroes, but many spontaneously honor heroes by commenting, applauding, or enthusiastically celebrating their deeds. The existence of a praising audience leads individuals to compete to attract the crowd's admiration. The outcome is a winner-take-all situation in which only one or a few individuals engage in extreme altruistic behavior. The more difficult part is to explain the crowd's propensity to pay tribute from an individual fitness optimization perspective. The model proposed here shows how heroic behavior and its celebration by a large audience may emerge together. This situation is possible if admirers use public praise as a social signal to promote their own commitment to the values displayed by the hero.</div></div>","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 1","pages":"Article 106656"},"PeriodicalIF":3.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The social benefits of “anti-social” punishment","authors":"Alain Schläpfer","doi":"10.1016/j.evolhumbehav.2025.106655","DOIUrl":"10.1016/j.evolhumbehav.2025.106655","url":null,"abstract":"<div><div>Punishment of defectors is believed to be a key factor in sustaining cooperation among unrelated individuals. However, several studies have shown that humans also frequently punish those that act cooperatively, a phenomenon termed anti-social punishment. While subsequent work has suggested reasons why anti-social punishment may be individually optimal, it is universally considered to be detrimental to cooperation and thus indeed “anti-social”. This study contradicts this view, showing that punishment of cooperators can be a positive factor in sustaining cooperation rates when used by conditional cooperators against those who cooperate unconditionally. This suggests that judging whether a punitive act is beneficial or detrimental to cooperation is more complex than previously thought.</div></div>","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 1","pages":"Article 106655"},"PeriodicalIF":3.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The quest for scientific objectivity: comment on Luke Glowacki's (2024) “The controversial origins of war and peace: Apes, foragers, and human evolution”","authors":"Douglas P. Fry","doi":"10.1016/j.evolhumbehav.2024.106650","DOIUrl":"10.1016/j.evolhumbehav.2024.106650","url":null,"abstract":"","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 1","pages":"Article 106650"},"PeriodicalIF":3.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Genetic markers of cousin marriage and honour cultures” [Evolution & Human Behaviour (2024) Volume 45, Issue 6, 106,636].","authors":"Olympia L.K. Campbell ,&nbsp;Cecilia Padilla-Iglesias ,&nbsp;Grégory Fiorio ,&nbsp;Ruth Mace","doi":"10.1016/j.evolhumbehav.2024.106637","DOIUrl":"10.1016/j.evolhumbehav.2024.106637","url":null,"abstract":"","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 1","pages":"Article 106637"},"PeriodicalIF":3.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emotional tears: What they are and how they work","authors":"Daniel Sznycer ,&nbsp;Asmir Gračanin ,&nbsp;Debra Lieberman","doi":"10.1016/j.evolhumbehav.2025.106652","DOIUrl":"10.1016/j.evolhumbehav.2025.106652","url":null,"abstract":"<div><div>Although much is known about emotional tears from the perspectives of neurobiology and behavior, the production of emotional tears and the responses they elicit depend sensitively on a rich set of computations—one which has received little attention to date. This review article aims to close this gap. Emotional tearing occurs during negative events (e.g., injuries) and positive events (e.g., achievements). Episodes of tearing appear to be united by tearers' subjective imputation of negative or positive value to certain internal or external phenomena. Knowing the degree to which objects, organisms, events, and states of affairs enhance or diminish one's prospects—the value of things—is a pressing matter for humans and other organisms. Value information is produced for internal consumption, to be used by behavior-regulating mechanisms in the focal individual. But some evaluations are made available, in addition, to other people, through tearing and other forms of verbal and non-verbal communication. Tearing may function as an implicit plea for receivers (the tear targets) to minimize the costs imposed on the tearer by nature, by third-parties, or by the tear targets themselves—common when the tearer has lower formidability or wherewithal than tear targets do. In addition, tearing may exhort tear targets to infer and register which things the tearer values, positively or negatively. Here, we characterize tears, describe the game-theoretic logic of bargaining from a position of weakness, outline the computational systems that regulate the production of and responses to emotional tears, and review findings about emotional tearing that are relevant to the signaling hypothesis.</div></div>","PeriodicalId":55159,"journal":{"name":"Evolution and Human Behavior","volume":"46 1","pages":"Article 106652"},"PeriodicalIF":3.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}