BELINCHÓN, MONTSERRAT
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BELINCHÓN, MONTSERRAT
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mbelinchono@udd.cl
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58654751100

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The role of exogenous testosterone and social environment on the expression of sociosexuality and status-seeking behaviors in young Chilean men

2024 , POLO RODRIGO, PABLO , FAJARDO RODRÍGUEZ, GABRIELA PAZ , MUÑOZ REYES, JOSÉ ANTONIO , VALENZUELA MARTÍNEZ, NOHELIA , BELINCHÓN, MONTSERRAT , FIGUEROA VALDEBENITO, ORIANA CRISTINA , Ana Fernández-Martínez , Marcel Deglín , Miguel Pita

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Evidence of the active participation of women in the intergroup conflict based on the use of aggression and cooperation

2023 , MUÑOZ REYES, JOSÉ ANTONIO , Daniel Torrico-Bazoberry , POLO RODRIGO, PABLO , Eugenio Guzmán-Lavín , FIGUEROA VALDEBENITO, ORIANA CRISTINA , FAJARDO RODRÍGUEZ, GABRIELA PAZ , Nohelia Valenzuela , BELINCHÓN, MONTSERRAT , RODRÍGUEZ SICKERT, CARLOS ANDRÉS , Miguel Pita

AbstractIntergroup conflict has been a persistent aspect of human societies since the emergence of our species. Various researchers have proposed that competition between groups has acted as a key selective force throughout human evolutionary history. Such intergroup competition for limited resources exacerbated the expression of intergroup aggression and intragroup cooperation. Furthermore, it would have a sexual dimorphism, with men demonstrating increased sensitivity to conflict threats—in order to maximize reproductive opportunities—, while women generally reject from active engagement in intergroup conflict. In the present study, we conducted behavioral experiments under controlled laboratory conditions to measure cooperation and aggression from using virtual games, specifically the Public Good Games and the Point Subtraction Aggression Paradigm, in a sample of 541 participants. We created control and experimental intergroup competition scenarios, where aggression and cooperation were necessary to increase monetary rewards. Our results shows that men modulate aggression and cooperation in the presence of intergroup conflict. In addition, our data also reveals that women cooperate more than men and display heightened levels of cooperation and aggression when confronted with intergroup conflict. These findings prompt a reevaluation of current functional theoretical models concerning the role of women in intergroup conflict and suggest that the dynamics of human aggression and cooperation may be more nuanced than previously believed.

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The effect of intergroup competition outcome on ingroup cooperation: insights from the male warrior hypothesis

2024 , BELINCHÓN, MONTSERRAT , POLO RODRIGO, PABLO , RODRÍGUEZ SICKERT, CARLOS ANDRÉS , FIGUEROA VALDEBENITO, ORIANA CRISTINA , Nohelia Valenzuela , Paula Pavez , MUÑOZ REYES, JOSÉ ANTONIO

The Male Warrior Hypothesis (MWH) proposes that sex-specific selective pressures have promoted male cooperation with the ingroup members to outcompete rival groups. However, intergroup conflicts do not occur in isolation and the outcomes of previous competitions may influence group cooperativeness. Since this phenomenon is not well understood, we aimed to shed light on the effect of previous competition outcome on later cooperative behavior under intergroup conflicts. Based on the MWH, we hypothesized that repeated contests between groups could enhance ingroup cooperation, regardless of the outcome of the previous contest because status is at risk, but when competition is not present, participants would move to the symmetric equilibria.MethodsTo test this hypothesis, we recruited 246 individuals organized in groups of 6 and measured cooperation using a threshold public good game over two rounds, manipulating the outcome in the first round to create groups of winners and losers.ResultsOur results show that intergroup conflict scenarios promoted cooperation in both victory and defeat conditions, whereas, in the control scenario only losers increased their cooperation.DiscussionWe argue that winners under the presence of an external threat may enhance in-group cooperation in order to assure their status; whereas, losers may be attempting to regain it.

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