Constraining free riding in public goods games: designated solitary punishers can sustain human cooperation

Much of human cooperation remains an evolutionary riddle. Unlike other animals, people frequently cooperate with non-relatives in large groups. Evolutionary models of large-scale cooperation require not just incentives for cooperation, but also a credible disincentive for free riding. Various theoretical solutions have been proposed and experimentally explored, including reputation monitoring and diffuse punishment. Here, we empirically examine an alternative theoretical proposal: responsibility for punishment can be borne by one specific individual. This experiment shows that allowing a single individual to punish increases cooperation to the same level as allowing each group member to punish and results in greater group profits. These results suggest a potential key function of leadership in human groups and provides further evidence supporting that humans will readily and knowingly behave altruistically

The evolutionary psychology of climate change behaviors:Insights and applications

We examine climate-related activities through an evolutionary psychology lens, zooming in on factors that motivate or discourage people to behave sustainably to mitigate climate change. Complementing current knowledge, we discuss five core ancestral psychological motivations that shape people's environmental decisions in fundamental ways. We review recent studies that explore how evolved psychological mechanisms related to self-interest, status, sensing, discounting tendencies, and social imitation can be used to promote proenvironmental behavior. We discuss the potential strengths and limitations of evolutionary-based behavioral interventions and briefly reflect on outstanding research questions that can further the integration of evolutionary approaches into mainstream environmental psychology

When Better Seems Bigger: Perceived Performance of Adult Professional Football Players Is Positively Associated With Perceptions of Their Body Size

Research has shown a positive association between cues of physical formidability and perceptions of status, supporting a generic “bigger-is-better” heuristic. However, does better also lead to appraisals as bigger? Recent research suggests that the perceptual association between body size and social status can also be explained in terms of prestige. To test whether perceptions of prestige lead to higher appraisals of body size, we examined whether people apply a “better is bigger bias” (BBB) in football, where performance and body size tend to be uncorrelated. In two studies, we examined real coalitional sports groups on a national (Study 1) and team level (Study 2), and we manipulated target performance in an experimental third study. Results suggest that perceived performance significantly predicted both the perceived height (Studies 2 and 3) and perceived weight (Studies 1 and 2) of professional football players, supporting the BBB. Support for the team had a positive effect on body size estimations of the players; however, we did not find any support for winner or loser effects. We discuss these results in light of individual versus team performance and coalitional affiliation

The triad model of follower needs:theory and review

Humans have an evolved flexible followership psychology that enables them to select different leaders in different contexts, depending on their needs. We distinguish a triad of follower needs: (i) guidance into a shared direction, (ii) active protection against threats, and (iii) judicious dispute settlement. These needs relate to critical group coordination challenges described in biology and anthropology and to different evolutionary leadership theories. We describe the contexts, in which these needs emerge, the characteristics of leaders who meet these needs, and the potential risks of following these leaders. We end by discussing the potential of our theory to aid the understanding of leadership in modern organizations, female leadership, leader manipulation of needs, and individual differences between followers

Convergence to consensus in heterogeneous groups and the emergence of informal leadership

When group cohesion is essential, groups must have efficient strategies in place for consensus decisionmaking. Recent theoretical work suggests that shared decision-making is often the most efficient way for dealing with both information uncertainty and individual variation in preferences. However, some animal and most human groups make collective decisions through particular individuals, leaders, that have a disproportionate influence on group decision-making. To address this discrepancy between theory and data, we study a simple, but general, model that explicitly focuses on the dynamics of consensus building in groups composed by individuals who are heterogeneous in preferences, certain personality traits (agreeability and persuasiveness), reputation, and social networks. We show that within-group heterogeneity can significantly delay democratic consensus building as well as give rise to the emergence of informal leaders, i.e. individuals with a disproportionately large impact on group decisions. Our results thus imply strong benefits of leadership particularly when groups experience time pressure and significant conflict of interest between members (due to various between-individual differences). Overall, our models shed light on why leadership and decision-making hierarchies are widespread, especially in human groups

Is green the new sexy? Romantic benefits of conspicuous conservation

© 2020 The Author(s)Conspicuous conservation refers to pro-environmental activities that are intended as signals of some attractive quality of the actor. As some of these qualities are desirable in romantic partners, people may purchase green products or services to impress potential romantic partners. We propose that conspicuous conservation communicates generosity – a trait that is especially valued in long-term romantic partners. Two studies tested whether people's sustainable product preferences influence how they are perceived as romantic partners (Study 1), and whether actual product preferences are aligned with these perceptions (Study 2). Results from Study 1 suggest that people presented as having purchased green products are perceived as more generous and more attractive as long-term – but also short-term – romantic partners. Results from Study 2 suggest that individuals primed to think about a romantic context are no more likely to prefer sustainable products, suggesting an actor-observer discrepancy that potentially adds to the honesty of the conspicuous conservation signal. The potential communicative value of conspicuous conservation is discussed in relation to the literature on costly signaling, sexual selection, and green marketing

Evolutionary Psychology’s next challenge: Solving modern problems using a mismatch perspective

As acceptance of evolutionary perspectives in mainstream psychology grows, it becomes increasingly pertinent to ask what evolutionary psychology can do to solve real-world problems and better our lives. Answers to this important question will more than likely require an understanding and application of the evolutionary mismatch framework. This powerful framework suggests that many of our contemporary problems—ranging from diabetes and depression to low fertility and sustainability—stem from a mismatch between our evolved psychological mechanisms, which are designed to be adaptive in ancestral contexts, and modern environments, which present novel stimuli that these mechanisms are not well suited to handle. By providing a better understanding of the functions of our evolved mechanisms and how they are incompatible with modern environments, the mismatch perspective can help with the generation of more enlightened and effective strategies to tackle modern problems than would otherwise be the case. We describe this perspective and discuss its potential efficacy and promise. (PsycInfo Database Record (c) 2020 APA, all rights reserved) Public Significance Statement—This article describes evolutionary mismatch – a process that likely underlies many of the problems that humans face in the modern world. As discussed, human minds are not designed for and thus, not well-suited to handle, modern environments. Accordingly, solving the various problems of the modern world will require researchers and policymakers to understand mismatch and how to work around it

Media multitasking, mind-wandering, and distractibility:A large-scale study

Previous studies suggest that frequent media multitasking - the simultaneous use of different media at the same time - may be associated with increased susceptibility to internal and external sources of distraction. At the same time, other studies found no evidence for such associations. In the current study, we report the results of a large-scale study (N=261) in which we measured media multitasking with a short media-use questionnaire and measured distraction with a change-detection task that included different numbers of distractors. To determine whether internally generated distraction affected performance, we deployed experience-sampling probes during the change-detection task. The results showed that participants with higher media multitasking scores did not perform worse as distractor set size increased, they did not perform worse in general, and their responses on the experience-sampling probes made clear that they also did not experience more lapses of attention during the task. Critically, these results were robust across different methods of analysis (i.e., Linear Mixed Modeling, Bayes factors, and extreme-groups comparison). At the same time, our use of the short version of the media-use questionnaire might limit the generalizability of our findings. In light of our results, we suggest that future studies should ensure an adequate level of statistical power and implement a more precise measure for media multitasking