Facial aesthetic minimally invasive procedure: More than just vanity, a social-psychological approach.

BACKGROUND: Due to the great importance of the face in social interaction, minimally invasive treatments can-besides their ability to rejuvenate and enhance beauty-also change the way facial impressions of a person are perceived. In recent literature, three main character traits (attractiveness, trustworthiness, and competence) and subdomains essential for facial perception were described. OBJECTIVE: To investigate whether minimally invasive procedures truly influence different character traits when evaluated by independent, objective observers. METHODS: Photographs of n = 34 female faces before and after treatment with injectable fillers and botulinum toxin were rated by 393 individuals without aesthetic background with regards to different character traits on a 7-point Likert scale. Tests for dimensionality were performed, and composite scores of the impressions underlying each of the three dimensions were created and compared using within-subjects t tests. RESULTS: Treatments statistically significantly improved the overarching character trait domains attractiveness, trustworthiness, and competence in posttreatment photographs compared with pretreatment. Posttreatment ratings of the respective subdomains also showed a statistically significant difference compared with pretreatment photographs, with the exception of the subdomain dominance which failed to reach statistical significance. CONCLUSION: Impressions of facial attractiveness, trustworthiness, and competence can be improved by injectables while the naturalness of the face is left intact. An implication is that the improvement of traits highly relevant to social interaction will accommodate the patient's desires for beautification and rejuvenation.

Sex bias in intergroup conflict and collective movements among social mammals: male warriors and female guides.

Intergroup conflict is a major evolutionary force shaping animal and human societies. Males and females should, on average, experience different costs and benefits for participating in collective action. Specifically, among mammals, male fitness is generally limited by access to mates whereas females are limited by access to food and safety. Here we analyse sex biases among 72 species of group-living mammals in two contexts: intergroup conflict and collective movements. Our comparative phylogenetic analyses show that the modal mammalian pattern is male-biased participation in intergroup conflict and female-biased leadership in collective movements. However, the probability of male-biased participation in intergroup conflicts decreased and female-biased participation increased with female-biased leadership in movements. Thus, female-biased participation in intergroup conflict only emerged in species with female-biased leadership in collective movements, such as in spotted hyenas and some lemurs. Sex differences are probably attributable to costs and benefits of participating in collective movements (e.g. towards food, water, safety) and intergroup conflict (e.g. access to mates or resources, risk of injury). Our comparative review offers new insights into the factors shaping sex bias in leadership across social mammals and is consistent with the 'male warrior hypothesis' which posits evolved sex differences in human intergroup psychology. This article is part of the theme issue 'Intergroup conflict across taxa'.

Psychological barriers to effective altruism: An evolutionary perspective.

People usually engage in (or at least profess to engage in) altruistic acts to benefit others. Yet, they routinely fail to maximize how much good is achieved with their donated money and time. An accumulating body of research has uncovered various psychological factors that can explain why people's altruism tends to be ineffective. These prior studies have mostly focused on proximate explanations (e.g. emotions, preferences, lay beliefs). Here, we adopt an evolutionary perspective and highlight how three fundamental motives - parochialism, status, and conformity - can explain many seemingly disparate failures to do good effectively. Our approach outlines ultimate explanations for ineffective altruism, and we illustrate how fundamental motives can be leveraged to promote more effective giving.

Construct and Predictive Validity of an Assessment Game to Measure Honesty-Humility.

Research on commercial computer games has demonstrated that in-game behavior is related to the players' personality profiles. However, this potential has not yet been fully utilized for personality assessments. Hence, we developed an applied (i.e., serious) assessment game to assess the Honesty-Humility personality trait. In two studies, we demonstrate that this game adequately assesses Honesty-Humility. In Study 1 (N = 116), we demonstrate convergent validity of the assessment game with self-reported Honesty-Humility and divergent validity with the other HEXACO traits and cognitive ability. In Study 2 (N = 287), we replicate the findings from Study 1, and also demonstrate that the assessment game shows incremental validity-beyond self-reported personality-in the prediction of cheating for financial gain, but not of counterproductive work and unethical behaviors. The findings demonstrate that assessment games are promising tools for personality measurement in applied contexts.

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.

Gendered outgroup prejudice: An evolutionary threat management perspective on anti-immigrant bias.

Are male and female immigrants viewed similarly or differently? Consistent with an evolutionary threat management perspective, we suggest that the answer to this question depends upon what types of threats immigrant groups are perceived as posing. In the present study, we compared attitudes toward male and female immigrants from either a violent ecology (e.g., Syria) or a pathogen-rich ecology (e.g., Liberia). We hypothesized that people would have more negative attitudes toward male than female immigrants from a violent ecology, but that attitudes would be similar toward male and female immigrants from a pathogen-rich ecology. Internal meta-analyses of three studies (total N = 1,488) were in line with our hypothesis. They showed that attitudes toward male immigrants from a violent ecology were more negative than attitudes toward female immigrants from the same ecology. In contrast, attitudes toward male and female immigrants were similar when those immigrants came from a pathogen-rich ecology. Our findings are consistent with an evolutionary threat management perspective on outgroup prejudice and are aligned with the male warrior hypothesis: Attitudes toward male versus female outgroup members vary with the potential threats these outgroups pose.

Understanding urbanicity: how interdisciplinary methods help to unravel the effects of the city on mental health.

Twenty-first century urbanization poses increasing challenges for mental health. Epidemiological studies have shown that mental health problems often accumulate in urban areas, compared to rural areas, and suggested possible underlying causes associated with the social and physical urban environments. Emerging work indicates complex urban effects that depend on many individual and contextual factors at the neighbourhood and country level and novel experimental work is starting to dissect potential underlying mechanisms. This review summarizes findings from epidemiology and population-based studies, neuroscience, experimental and experience-based research and illustrates how a combined approach can move the field towards an increased understanding of the urbanicity-mental health nexus.

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.

A Dual Model of Leadership and Hierarchy: Evolutionary Synthesis.

From the popularity of authoritarian political leaders to the under-representation of women in boardrooms, leadership is an important theme in current human social affairs. Leadership is also a prominent research topic in the biological, social, and cognitive sciences. However, these active literatures have evolved somewhat independently and there is a need for synthesis. A comparative-evolutionary approach can integrate seemingly divergent perspectives by making a distinction between two leadership styles, prestige and dominance, that have contrasting expressions, functions, histories, and neural and developmental pathways. The distinction may help to resolve various scientific puzzles, such as: (i) opposing views on the different functions and expressions of leadership; (ii) the appeal of dominance-style leaders; and (iii) sex biases in leadership emergence in modern society.

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.

Generalized or Origin-Specific Out-Group Prejudice?: The Role of Temporary and Chronic Pathogen-Avoidance Motivation in Intergroup Relations.

Researchers have proposed that intergroup prejudice is partially caused by behavioral immune system mechanisms. Across four studies (total N = 1,849), we used both experimental (pathogen priming) and individual differences (pathogen disgust sensitivity [PDS]) approaches to test whether the behavioral immune system influences prejudice toward immigrants indiscriminately (the generalized out-group prejudice hypothesis) or specifically toward immigrants from a pathogen-rich ecology (the origin-specific out-group prejudice hypothesis). Internal meta-analyses lend some support to both hypotheses. At the experimental level, pathogen primes had no effect on attitudes toward origin-unspecified immigrants or immigrants from a pathogen-rich ecology. At the individual differences level, PDS has a unique negative effect on comfort with immigrants from pathogen-rich ecologies but not on comfort with immigrants from unspecified ecologies. However, pathogen disgust sensitivity was negatively related to the decision to allow entry to both origin-unspecified immigrants and immigrants from a pathogen-rich ecology.

Conspiracy Theories: Evolved Functions and Psychological Mechanisms.

Belief in conspiracy theories-such as that the 9/11 terrorist attacks were an inside job or that the pharmaceutical industry deliberately spreads diseases-is a widespread and culturally universal phenomenon. Why do so many people around the globe believe conspiracy theories, and why are they so influential? Previous research focused on the proximate mechanisms underlying conspiracy beliefs but ignored the distal, evolutionary origins and functions. We review evidence pertaining to two competing evolutionary hypotheses: (a) conspiracy beliefs are a by-product of a suite of psychological mechanisms (e.g., pattern recognition, agency detection, threat management, alliance detection) that evolved for different reasons, or (b) conspiracy beliefs are part of an evolved psychological mechanism specifically aimed at detecting dangerous coalitions. This latter perspective assumes that conspiracy theories are activated after specific coalition cues, which produce functional counterstrategies to cope with suspected conspiracies. Insights from social, cultural and evolutionary psychology provide tentative support for six propositions that follow from the adaptation hypothesis. We propose that people possess a functionally integrated mental system to detect conspiracies that in all likelihood has been shaped in an ancestral human environment in which hostile coalitions-that is, conspiracies that truly existed-were a frequent cause of misery, death, and reproductive loss.

Voting for a Male Warrior or Female Peacekeeper? Testing the Evolutionary Contingency Hypothesis in the 2016 U.S. Presidential Elections.

The present research replicates and extends previous literature on the evolutionary contingency hypothesis of leadership emergence. Using artificially masculinized versus feminized versions of the faces of the candidates for the 2016 U.S. presidential elections, we demonstrated that different contextual cues produced systematic variation in both preferences for and personality impressions of leadership. We describe results of an online study ( N = 298), demonstrating that followers who perceived a match between the contextual prime ( intergroup conflict or cooperation) and a leader candidate's relevant physical cues ( masculinized or feminized versions of their faces) both (a) preferred them as leaders and (b) rated them more positively on personality attributes commonly associated with effective leadership such as trustworthiness, warmth, competence, and charisma.

Remember your crimes: How an appeal to ingroup wrongdoings fosters reconciliation in separatist conflict.

The aim of this study was to compare the effectiveness of appeals to ingroup wrongdoings, as opposed to ingroup rightdoings, on reconciliation between groups in a real-world conflict. We conducted an experiment in Indonesia, where separatist conflict in the province West Papua is currently unresolved. Participants were a sample of Javanese residents (N = 502), representing the majority group in Indonesia. Compared to ingroup rightdoings, being reminded of ingroup wrongdoings significantly increased participants' sense of perpetratorhood. These feelings of being a perpetrator in turn fostered participants' reconciliatory attitudes towards the separatist group. These findings reveal that an appeal to ingroup wrongdoings can be effective in promoting intergroup reconciliation. In addition to theoretical implications, we discuss practical implications in terms of highlighting the importance of acknowledging ingroup wrongdoings as part of an intervention programme.

The Napoleon Complex: When Shorter Men Take More.

Inspired by an evolutionary psychological perspective on the Napoleon complex, we hypothesized that shorter males are more likely to show indirect aggression in resource competitions with taller males. Three studies provide support for our interpretation of the Napoleon complex. Our pilot study shows that men (but not women) keep more resources for themselves when they feel small. When paired with a taller male opponent (Study 1), shorter men keep more resources to themselves in a game in which they have all the power (dictator game) versus a game in which the opponent also has some power (ultimatum game). Furthermore, shorter men are not more likely to show direct, physical aggression toward a taller opponent (Study 2). As predicted by the Napoleon complex, we conclude that (relatively) shorter men show greater behavioral flexibility in securing resources when presented with cues that they are physically less competitive. Theoretical and practical implications are discussed.

Hair cortisol and work stress: Importance of workload and stress model (JDCS or ERI).

Hair cortisol concentrations (HCCs) are a potential physiological indicator of work related stress. However, studies that tested the relationship between HCC and self-reported stress in a work setting show mixed findings. This may be because few studies used worker samples that experience prolonged stress. Therefore, we compared a high workload sample (n = 81) and a normal workload sample (n = 91) and studied whether HCC was related to: (i) high job demands, low control, and low social support (JDCS model), and (ii) high effort, low reward, and high overcommitment (ERI model). Results showed that self-reported stress related to HCC only in the high workload sample and only for the variables of the ERI model. We found that HCC was higher when effort was high, reward low, and overcommitment high. An implication of this study is that a certain stress threshold may need to be reached to detect a relationship between self-reported stress and physiological measures such as HCC.

Empowering the poor: A field study of the social psychological consequences of receiving autonomy or dependency aid in Panama.

This field study investigated the consequences of receiving poverty aid through conditional transfer programmes in the form of autonomy-oriented help (i.e., cash) or dependency-oriented help (i.e., vouchers) in impoverished rural communities in Panama. The empowering effects of autonomy- (vs. dependency-) help have so far only been studied in laboratory settings, or in settings where help could easily be refused. Little is known about the reactions of people who rely on help for extended periods of time. This study provides insights into how aid recipients are influenced by the type of aid they receive. Results showed that, as expected, recipients of cash reported more autonomy, empowerment, and life improvements than recipients of vouchers. Training, another type of autonomy-oriented help, was positively related to empowerment, personal, and family change beliefs. These findings illustrate the benefits of autonomy-oriented help programmes in empowering people from extremely poor communities around the world, who rely on aid for extended periods of time.