Antonio M. Espín

TL;DR: The effects of being a student and being a volunteer on behavior are examined to suggest that self-selected students are an appropriate subject pool for the study of social behavior.

TL;DR: The size and variability of the effect of time pressure on cooperative decisions are assessed by combining 21 separate, preregistered replications of the critical conditions from Study 7 of the original article and the results are consistent with the presence of selection biases and the absence of a causal effect ofTime pressure on cooperation.

TL;DR: This paper tests to what extent 2D:4D, as a proxy for the prenatal ratio of testosterone/estrogens, can predict CRT scores in a sample of 623 students and observes that a lower 2D?:4D is significantly associated with a higher number of correct answers.

TL;DR: The results indicate that the individual's time horizon is relevant for the type of social behaviour she opts for in a multilateral cooperation game and that punishment grounded on morals may be related to lasting or delayed psychological incentives, whereas punishment triggered by competitive desires may be linked to short-run aspirations.

TL;DR: Using two large-scale experiments, the nature of Ultimatum Game punishers is explored by analyzing their behavior in a Dictator Game, and the coexistence of two entirely different sub-populations is confirmed: prosocial punishers on the one hand, who behave fairly as dictators, and spiteful (antisocial) punisher on the other, who are totally unfair.