An astonishing fact about the obtained results was that individuals represented a co-actor's task although this was not required by their own task. There was no need for action coordination at all. Why, then, was the other constantly on one's mind?
To anticipate others' actions, one must have an understanding of their tasks. Creating shared task representations can thus be regarded as one of several special demands on individuals coordinating their actions. It is conceivable that this demand has shaped cognitive systems in a way that individuals cannot help representing others' actions and their effects, and integrating them in their own action planning when possible.