“…The process of placing trust when it has previously been reciprocated, but stopping once trust is abused, is often referred to as a tit-for-tat strategy, and has been demonstrated to be the optimal strategy for repeated interactions (Axelrod & Hamilton, 1981). Repeated interactions have also been shown to influence subjective ratings of moral character in a Prisoner's Dilemma game (Singer, Kiebel, Winston, Dolan, & Frith, 2004) and in a Trust Game (Delgado et al, 2005). These findings suggest that in a repeated interaction, trustworthiness can be learned based on the history of a partner's behavior.…”