It signals empathy and concern for the other's wellbeing and is a prerequisite for continuity in the relationship. Tedeschi and Lindskold (1976, p. 482) note that “stable attraction will develop for a stimulus person only when the recipient is able to say: “He is rewarding me because he likes me and cares about my welfare””. If the recipient perceives that the reward is provided unintentionally or because it is the duty of the provider, no increment in attraction occurs (Heider, 1958; Tedeschi, 1974). Indeed, the provider may attempt to convince the benefactor that a reward is provided unselfishly, in good spirit, or to help, in order to trigger reciprocal rewards