When emotions run high: A critical role for context in the unfolding of dynamic, real-life facial affect.

Although positive and negative affect are assumed to be highly distinct, recent work has shown that facial valence of positive and negative situations may be highly confusable, especially when the emotions are intense. However, previous work has relied exclusively on static images, portraying a single peak frame of the emotional display. Dynamic expressions, on the other hand, convey a far broader representation of the emotional reaction, but are they diagnostic of the situational valence? Participants (