2.2. Social experiments

The third (fig. 1, C) and fourth experiments (fig. 1, D) presented two actors engaged in a social game in which they could either cooperate or defect. Participants were instructed to infer the nature of the second player’s social intention (i.e. cooperative or defective intention). In both these experiments, the bias was assigned according to the way the second player responded to the strategy adopted by the opponent in the previous round. Participants were therefore biased towards the reputation of the second player rather than towards one particular type of social intention. Finally, as in the two previous non-social experiments, both motor intentions (single motor acts) and superordinate intentions (sequences of motor acts leading to the construction of a shape) were considered in the last two experiments.