Physical reactions to evocative images predict political participation

New Scientist - Sweaty palms and puppy love: the physiology of voting

Scientists showed (only) 51 subjects a series of pictures, some of which are known to evoke an "autonomic sweat response", among these: pictures of puppies, sunsets, fighting/violence, or vomit. Scientists monitored the level of sweat these subjects exuded; presumably sweat is linked to their emotive responses to the pictures. Separately, the subjects were asked questions about their level of political participation: voting habits and whether they had ever contacted public officials. There was a correlation between more sweating and political participation. The suggestion is that people who have more physical responses to world events are more likely to participate in politics. It also suggests that evocative images will elicit higher levels of political activity.