![]() ![]() However, despite knowing little about potential partners’ intentions or probity, we may nevertheless choose to trust them to achieve greater gains for ourselves and to satisfy our own tastes for equity. ![]() Socio-economic interactions with strangers are inherently risky. We also found that inequality aversion was higher in females and, in a novel relation, that socio-economic deprivation was associated with more risk averse play. Males showed lower risk-aversion, associated with greater investments. Consistent with the literature, we showed an overall trend towards higher trust from adolescence to young adulthood but, in a novel finding, we characterized key cognitive mechanisms explaining this, especially regarding socio-economic risk aversion. We found highly significant differences in investment behaviour according to age, sex, socio-economic status and IQ. We quantified social behaviour using a multi round investor-trustee task, phenotyping individuals using a validated model whose parameters characterise patterns of real exchange and constitute latent social characteristics. Here, we used a cross sectional sample (n = 784) to study how the challenges of cooperation versus defection are negotiated across an important period of the lifespan: from adolescence to young adulthood (ages 14 to 25). Nevertheless, the potential rewards for cooperating can be great. Investing in strangers in a socio-economic exchange is risky, as we may be uncertain whether they will reciprocate.
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