Human adults perceive others as intentional agents and attribute thoughts, beliefs and intentions to them, which helps to explain and predict the behaviour of others (Gummerum & Chu, 2014). Understanding others' intentions is fundamental for legal systems, sport competitions and many other of our daily interactions. Furthermore, reading intentions might be especially important in the context of reciprocal cooperation, where individuals help those that are cooperative (Trivers, 1971).Reciprocity is a strong determining factor for human behaviour; we reciprocate with familiar and unfamiliar partners on an almost daily basis (Bowles & Gintis, 2011). In order to only cooperate with helpful