The developmental emergence of direct reciprocity and its influence on prosocial behavior

The influence of socioeconomic status and appearance-reality understanding on pre-schoolers' sharing and generosity

Prosocial behaviour can be defined as any voluntary action that is performed to benefit another individual. Despite accumulating evidence of the importance of environmental variables (e.g., socioeconomic status; SES), and individual characteristics (e.g., theory of mind - ToM - skills), in influencing prosocial behaviours in young children, it is unknown how these factors relate to the underlying motivations for prosocial behaviours. Accordingly, both extrinsically (sharing) and intrinsically (generosity)-guided prosocial behaviours are measured in this study. We explore the influences of SES and ToM skills on young children's sharing behaviour and generosity, while controlling their age, working memory and language skills. Sixty-six 4- to 6 year olds (Mage  = 5.24 years, SD = 0.73) from diverse SES (measured by parental education level) and ethnic backgrounds in Singapore completed tasks assessing the ToM measures of false belief and appearance-reality understanding, working memory, language skills, generosity, and sharing behaviour. The results of hierarchical regression analyses demonstrate that the father's education level and children's appearance-reality understanding were significant predictors of sharing, after controlling for age, working memory, language skills, and the mother's education level. Children's appearance-reality understanding was the sole predictor of children's generosity. Our findings highlight the impact of children's ability to hold different views of reality and their family's education levels on the development of sharing and generosity in early childhood.

Reputation and reciprocity

Reputation and reciprocity are key mechanisms for cooperation in human societies, often going hand in hand to favor prosocial behavior over selfish actions. Here we review recent researches at the interface of physics and evolutionary game theory that explored these two mechanisms. We focus on image scoring as the bearer of reputation, as well as on various types of reciprocity, including direct, indirect, and network reciprocity. We review different definitions of reputation and reciprocity dynamics, and we show how these affect the evolution of cooperation in social dilemmas. We consider first-order, second-order, as well as higher-order models in well-mixed and structured populations, and we review experimental works that support and inform the results of mathematical modeling and simulations. We also provide a synthesis of the reviewed researches along with an outlook in terms of six directions that seem particularly promising to explore in the future.

Italian Validation of the Delaying Gratification Inventory in Adolescents

The delay of gratification (DoG) is defined as the willingness to forego immediate satisfaction to achieve greater long-term gratification. This ability is essential in adolescence, as its development is crucial against desirable versus undesirable behaviors. This study investigated the psychometric proprieties of the Delaying Gratification Inventory (DGI) in Italian adolescents. A total of 621 Italian adolescents, ranging from 14 to 17 years old (M = 15.92, SD = 1.05; 47.7% boys), participated in the study. Confirmatory factor analysis identified a four-factor structure (delay of gratification concerning Food, Social Interaction, Money, and Achievement). The reliability of the Italian DGI was acceptable. Measurement invariance across gender was supported. Boys reached a higher DoG score in the Food subscale and a lower score in the Social Interaction and Achievement subscales than girls. Moreover, the Italian DGI dimensions were all positively correlated with self-control and prosocial behavior. Except for the Social Interaction subscale, positive correlations were found between the Food, Money, and Achievement subscales and self-esteem. The present findings suggest that the Italian DGI could be used for assessing DoG ability, a key regulatory ability that promotes healthy behaviors in adolescence.

Social Expectations are Primarily Rooted in Reciprocity: An Investigation of Fairness, Cooperation, and Trustworthiness

Social expectations guide people's evaluations of others' behaviors, but the origins of these expectations remain unclear. It is traditionally thought that people's expectations depend on their past observations of others' behavior, and people harshly judge atypical behavior. Here, we considered that social expectations are also influenced by a drive for reciprocity, and people evaluate others' actions by reflecting on their own decisions. To compare these views, we performed four studies. Study 1 used an Ultimatum Game task where participants alternated Responder and Proposer roles. Modeling participants' expectations suggested they evaluated the fairness of received offers via comparisons to their own offers. Study 2 replicated these findings and showed that observing selfish behavior (lowball offers) only promoted acceptance of selfishness if observers started acting selfishly themselves. Study 3 generalized the findings, demonstrating that they also arise in the Public Goods Game, emerge cross-culturally, and apply to antisocial punishment whereby selfish players punish generosity. Finally, Study 4 introduced the Trust Game and showed that participants trusted players who reciprocated their behavior, even if it was selfish, as much as they trusted generous players. Overall, this research shows that social expectations and evaluations are rooted in drives for reciprocity. This carries theoretical implications, speaking to a parallel in the mechanisms driving both decision-making and social evaluations, along with practical importance for understanding and promoting cooperation.

Does language make people more prosocial? The influence of Mandarin proficiency on donation behavior

Both the effects of language proficiency on individual outcomes, and the influencing factors of individual donation arouse wide concern, but researchers have hardly probed into the relationship between language proficiency and donation behavior. Using the data from the 2012 China General Social Survey (CGSS) and the binary logistic regression model as the benchmark model, this study empirically examines the influence and mechanism of language proficiency on donation behavior. It is revealed that Mandarin proficiency has significant positive influence on individual donation behavior. According to the results of the variable substitution practice and the instrumental variable regression based on the two-stage least square model, the above conclusion remains robust. The heterogeneity test shows that Mandarin proficiency of male, southern and rural residents has more obvious impact on donation behavior. The multiple intermediary effect test indicates that perceived social responsibility and subjective social status partially mediate the relationship between Mandarin proficiency and donation behavior. Therefore, it indicates that language proficiency has a prosocial effect, which makes people more prosocial. This study contributes to the literature on donation behavior by examining the influencing mechanism of Mandarin proficiency on individual donation, and further the effects of language proficiency on individual outcomes, thereby providing theoretical and empirical support for the formulation of policies for the promotion of Mandarin and social donation in China.

The effect of shame on prosocial behavior tendency toward a stranger

BACKGROUND

This study aimed to examine the effect of different types of shame on prosocial behavior tendency to different help-seekers.

METHODS

A total of 120 participants were randomly assigned to a neutral mood condition, a public shame or a private shame condition.

RESULTS

All participants rated their willingness to help a benefactor and a stranger in an everyday helping situation and a money-donating situation after emotion-induction. The study found a higher willingness of participants in the public shame group to help strangers than those in neutral mood and private shame groups.

CONCLUSION

These findings support a facilitation effect of public shame on prosocial behavior tendency toward strangers, indicating an effect of restoring motive of shame on social interaction. The results are further discussed in light of the functionalism of shame.

Strategic complexity and cognitive skills affect brain response in interactive decision-making

Deciding the best action in social settings requires decision-makers to consider their and others’ preferences, since the outcome depends on the actions of both. Numerous empirical investigations have demonstrated variability of behavior across individuals in strategic situations. While prosocial, moral, and emotional factors have been intensively investigated to explain this diversity, neuro-cognitive determinants of strategic decision-making and their relation with intelligence remain mostly unknown. This study presents a new model of the process of strategic decision-making in repeated interactions, first providing a precise measure of the environment’s complexity, and then analyzing how this complexity affects subjects’ performance and neural response. The results confirm the theoretical predictions of the model. The frequency of deviations from optimal behavior is explained by a combination of higher complexity of the strategic environment and cognitive skills of the individuals. Brain response correlates with strategic complexity, but only in the subgroups with higher cognitive skills. Furthermore, neural effects were only observed in a fronto-parietal network typically involved in single-agent tasks (the Multiple Demand Network), thus suggesting that neural processes dealing with cognitively demanding individual tasks also have a central role in interactive decision-making. Our findings contribute to understanding how cognitive factors shape strategic decision-making and may provide the neural pathway of the reported association between strategic sophistication and fluid intelligence.

Normative views and resource distribution behavior in childhood: Dissociated at the group level, but associated at the individual level

Previous research debated whether and to which extent normative views and own resource distribution behavior in childhood are dissociated or aligned. The present study aims to advance this debate by examining the relation from two different methodological viewpoints within the same study. Here, 4–6-year-old children’s ( N = 91) normative views and distribution behavior when confronted with a rich friend and a poor non-friend were assessed. Children’s spontaneous protest and affirmation toward distributors, evaluations, and punishment judgments served as normative indicators. Looking at average normative views and behavior, preschoolers held a normative view toward rectifying inequalities while favoring the rich friend themselves. Looking at the consistency of interindividual differences, preschooler’s normative view correlated with behavior. The study highlights that the relation between normative views and behavior is characterized by both dissociation and coherence.

Preschoolers' ingroup bias in predicting others' sharing: The role of contexts and theory of mind

The current study investigated preschoolers' ingroup bias in predicting people's sharing across contexts and its relation to second-order theory of mind (ToM) ability. In Experiment 1, 96 5- and 6-year-old children were assigned to one of two groups in a minimal group paradigm. They heard a story about fictional ingroup and outgroup peers sharing in a public or private condition and were asked to predict and evaluate their sharing behavior. Children predicted that ingroup peers would share more than outgroup peers and also showed ingroup bias in evaluation regardless of the equal actual sharing of ingroup and outgroup peers. Moreover, 6-year-olds displayed a flexible ingroup bias in predicting others' sharing across conditions because they held such a bias only in public conditions and did not expect ingroup and outgroup peers to share differently in private conditions. Experiment 2 tested a new sample of 80 6-year-olds with the same sharing story and a second-order false belief task. Results showed that only 6-year-olds who fully passed the false belief task showed a flexible bias in predicting sharing across conditions. Results indicate that children's ingroup bias in predicting others' sharing is becoming flexible across contexts as they grow up and ToM skills contribute to the development of their increasingly sophisticated prosocial reasoning.

Direct and indirect reciprocity among individuals and groups

Direct and indirect reciprocity are two fundamental mechanisms that promote prosocial behavior within groups and across societies. Here, we review recent work that illustrates how a (direct and indirect) reciprocity framework can illuminate our understanding of several factors related to prosocial behavior - namely group membership, gossip, and third-party punishment. We propose that each of these factors can promote prosocial behavior via proximate psychological mechanisms related to direct and indirect reciprocity: reputational concern, expectations, and anticipation of future interaction. Finally, we discuss the implications of adopting such a framework and highlight a number of avenues for future research.

I'm not a little kid anymore! Reciprocal social influence in child-adult interaction

Human decisions are often influenced by others' opinions. This process is regulated by social norms: for instance, we tend to reciprocate the consideration received from others, independently of their reliability as information sources. Nonetheless, no study to date has investigated whether and how reciprocity modulates social influence in child-adult interaction. We tested 6-, 8- and 10-year-old children in a novel joint perceptual task. A child and an adult experimenter made perceptual estimates and then took turns in making a final decision, choosing between their own and partner's response. We manipulated the final choices of the adult partner, who in one condition chose often the child's estimates, whereas in another condition tended to confirm her own response. Results reveal that 10-year-old children reciprocated the consideration received from the partner, increasing their level of conformity to the adult's judgements when the partner had shown high consideration towards them. At the same time, 10-year-old children employed more elaborate decision criteria in choosing when trusting the adult partner compared to younger children and did not show egocentric biases in their final decisions. Our results shed light on the development of the cognitive and normative mechanisms modulating reciprocal social influence in child-adult interaction.

Friendship is more than strategic reciprocity: Preschoolers' selective sharing with friends cannot be reduced to strategic concerns

The current study investigated whether children share especially much with their friends when sharing can be reciprocated (strategic sharing) or whether friendship and strategic reciprocity are independent factors in predicting children's sharing. If the former is the case, children should prefer their friend relatively more in a situation where the friend can reciprocate than in a situation without the possibility for reciprocity. In two experiments, 3- and 5-year-old participants (N = 270) could distribute stickers between themselves and three recipients: a friend, a child who would join the kindergarten group the next day, and a stranger. Half of the children were led to believe that their generosity could be reciprocated, and the other half were not. In Experiment 1, this was implemented by anonymous and nonanonymous sharing. In Experiment 2, the possibility of reciprocity or lack thereof was explicitly mentioned. The results show that participants across both age groups shared more resources with their friend than with less familiar recipients. Potential reciprocity affected 5-year-olds' sharing but not 3-year-olds' sharing-but only if reciprocity was explicitly mentioned (Experiment 2). Importantly, the preference for the friend was independent of the possibility to be reciprocated for all children. The current study shows that friendship and strategic reciprocity are relevant but probably largely independent factors for children's sharing. That is, the preference to share with friends cannot be reduced to strategic considerations.

Prosocial television and prosocial toddlers: A multi-method, longitudinal investigation

How screen use might affect early childhood outcomes is an important question for parents, but existing research is patchy. In particular, screen time is often examined in relation to sleep and aggression, but much less is known about its links with prosocial behaviour. To address this gap, we conducted semi-structured observations and interviews / questionnaires with both mothers and fathers in a sample of 195 (predominantly affluent and educated) British families tracked across three time-points, when the first-born child was 14-, 24-, and 36-months old. We also applied an objective coding scheme to assess the relative frequency of prosocial behaviour in the programmes and films children were watching at age 24-months. While our results showed no overall associations between prosocial behaviour and either screen time or screen content, there were interaction effects. Specifically, children whose favourite programmes were slow-paced and rich in prosocial content were particularly likely to show developmental gains in sharing. We discuss these findings in terms of their implications for parents, researchers, and policy makers.

The Effect of Target's Power on Prosocial Behavior: A Cross-Cultural Study

Social power predicts numerous important life outcomes and social orientations. Thus far, the research literature has mainly examined how an individual's own power shapes interactions with others, whereas whether a target's power affects social interactions has been relatively neglected. In particular, does a target's power have an effect on the agent's prosocial behavior? Furthermore, could culture along with the power distance dimension alter the effect of a target's power on prosocial behavior? To explore these two research questions, we investigated the effect of a target's power (power unspecified targets vs. powerful targets) on prosocial behavior in both China and the United States. Questionnaires measuring prosocial behavior toward power unspecified or powerful targets were distributed to Chinese and American emerging adults (n _{in total} = 893). According to the results, both Chinese and Americans were less likely to help powerful targets compared with power unspecified targets. Moreover, the Chinese were less prosocial toward both power unspecified and powerful targets in comparison to the Americans. These findings highlight the key roles of a target's power and culture in shaping an individual's prosocial behavior.

Paying it forward: The development and underlying mechanisms of upstream reciprocity

Two studies investigated the development and motivations underlying children's upstream reciprocity. In Study 1, 3- and 4-year-olds (n = 40 per age group) received or did not receive help while playing a game. Subsequently, children could share stickers with a new child. The 4-year-olds, but not the 3-year-olds, showed evidence of upstream reciprocity: Those who had received help were more generous toward the new child. Study 2 (N = 46) replicated the results with 4-year-olds and found evidence for a gratitude-like motivation underlying the upstream reciprocity: Children who received help evaluated the benefactor more positively, and positive evaluations of the benefactor correlated with children's upstream reciprocity. Thus, upstream reciprocity emerges by 4 years of age and may already be motivated by a gratitude-like mechanism.

Pay to play: Children's emerging ability to use acts of generosity for selfish ends

Adults will offer favors to advance their standing and solicit a favor in return, using ostensibly prosocial acts strategically for selfish ends. Here we assessed the developmental emergence of such strategic behaviors in which individuals are generous to elicit future reciprocation from others. In a novel experimental paradigm with children aged 3 to 7 years, we tested whether children are willing to share more valuable resources when this act could prompt subsequent reciprocation. In an Experimental condition, children could share a more attractive or less attractive resource with a person who they knew would subsequently choose to play a game with either the children or another individual. In the Control condition, children knew the person would play alone. Across two studies, we found that over repeated trials, 5- and 7-year-olds, but not 3-year-olds, learned to share more valuable resources in the Experimental condition than in the Control condition. This shows that older age groups were able to quickly learn how to influence the subsequent partner choice in a novel situation. We address theoretical questions about the various types of reciprocity as being supported by different psychological mechanisms and discuss whether the current results could be explained by children's emerging ability for future-directed thinking.

Playing a cooperative game promotes preschoolers' sharing with third-parties, but not social inclusion

This study examined the effect of gaming context on young children's prosocial behaviors. Dyads of 4- to 5-year-old children (N = 96) played the same game cooperatively, competitively, or solitarily. After playing the game for a total of ten minutes, sharing with and social inclusion of uninvolved third-parties as well as free play with previous co-players was observed. Children shared less with third-parties after playing the game competitively than after playing it cooperatively. Playing a solitary game resulted in intermediate levels of sharing. The structure of the game did not differentially impact measures of social inclusion or free play.

Economic trust in young children

Mutually beneficial interactions often require trust that others will reciprocate. Such interpersonal trust is foundational to evolutionarily unique aspects of human social behaviour, such as economic exchange. In adults, interpersonal trust is often assessed using the 'trust game', in which a lender invests resources in a trustee who may or may not repay the loan. This game captures two crucial elements of economic exchange: the potential for greater mutual benefits by trusting in others, and the moral hazard that others may betray that trust. While adults across cultures can trust others, little is known about the developmental origins of this crucial cooperative ability. We developed the first version of the trust game for use with young children that addresses these two components of trust. Across three experiments, we demonstrate that 4- and 6-year-olds recognize opportunities to invest in others, sharing more when reciprocation is possible than in a context measuring pure generosity. Yet, children become better with age at investing in trustworthy over untrustworthy partners, indicating that this cooperative skill emerges later in ontogeny. Together, our results indicate that young children can engage in complex economic exchanges involving judgements about interpersonal trust and show increasing sensitivity to appropriate partners over development.

Norms and the Flexibility of Moral Action

A complex web of social and moral norms governs many everyday human behaviors, acting as the glue for social harmony. The existence of moral norms helps elucidate the psychological motivations underlying a wide variety of seemingly puzzling behavior, including why humans help or trust total strangers. In this review, we examine four widespread moral norms: Fairness, altruism, trust, and cooperation, and consider how a single social instrument-reciprocity-underpins compliance to these norms. Using a game theoretic framework, we examine how both context and emotions moderate moral standards, and by extension, moral behavior. We additionally discuss how a mechanism of reciprocity facilitates the adherence to, and enforcement of, these moral norms through a core network of brain regions involved in processing reward. In contrast, violating this set of moral norms elicits neural activation in regions involved in resolving decision conflict and exerting cognitive control. Finally, we review how a reinforcement mechanism likely governs learning about morally normative behavior. Together, this review aims to explain how moral norms are deployed in ways that facilitate flexible moral choices.

Reciprocity Among Preschoolers in Relation to Resource Allocation Toward Siblings, Friends, and Strangers

Children at age 6 years differentially treat kin, friends, and strangers in resource allocation games by being more altruistic toward kin. However, it is unknown how previous allocation experience as a recipient influences the potential kinship effect in subsequent resource allocations. The present study investigated how 4- to 6-year-old children allocated resources between themselves and a sibling, a friend, or a stranger in three allocation tasks after the recipient had previously shared or nonshared with the participant. Results showed that, when a share would induce cost on the self, 6-year-old children were likely to share with a sibling whether the sibling had previously shared or not, but they would share only with friends or strangers who had previously shared. When a share would induce no cost, participants across ages were likely to share with a recipient who had previously shared. When the decision option was between sharing equally and sharing altruistically, participants would allow the recipient to have more only when the recipient was a sibling or friend who had previously allocated altruistically. These findings suggest that kin altruism in resource allocation emerges at around 6 years of age and that reciprocity partly overrides and partly reinforces kin altruism.