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We conducted 2 experiments in which we tested whether situation valence moderates the psychological consequences of lacking control. Participants who lacked control in negative circumstances were more likely to perceive illusory patterns. However, participants who lacked control in
positive circumstances saw many fewer images compared to those in the full-control condition. Our results indicated that situation valence is an effective moderator of the psychological consequences of lacking control.

This paper proposes a multi-demand negotiation model that takes the effect of human users' psychological characteristics into consideration. Specifically, in our model each negotiating agent's preference over its demands can be changed, according to human users' attitudes to risk, patience and regret, during the course of a negotiation. And the change of preference structures is determined by fuzzy logic rules, which are elicited through our psychological experiments. The applicability of our model is illustrated by using our model to solve a problem of political negotiation between two countries. Moreover, we do lots of theoretical and empirical analyses to reveal some insights into our model. In addition, to compare our model with existing ones, we make a survey on fuzzy logic based negotiation, and discuss the similarities and differences between our negotiation model and various consensus models.

Abstract
Nostalgia, a sentimental longing for a personally experienced and valued past, is a social emotion. It refers to significant others in the context of momentous life events and fosters a sense of social connectedness. On this basis, the authors hypothesized that (1) nostalgia promotes charitable intentions and behavior, and (2) this effect is mediated by empathy with the charity's beneficiaries. Five studies assessed the effect of nostalgia on empathy, intentions to volunteer and donate, as well as tangible charitable behavior. Results were consistent with the hypotheses. Study 1 found that nostalgia increases charitable intentions. Study 2 showed that this salutary effect of nostalgia on charitable intentions is mediated by empathy (but not by personal distress). Studies 3 and 4 corroborated these finding for different charities and in diverse samples. Finally, study 5 demonstrated that nostalgia increases tangible charitable behavior. By virtue of its capacity to increase empathy, nostalgia facilitates prosocial reactions.