Presents study results determining the effect of incentives on willingness to participate in experiments involving varying degrees of aversive treatments. Reports methods, procedures, and results for three different experiments. Concludes that willingness to participate was greater with larger incentives but lower for aversive treatments. Argues…

Presents results of study of British elementary school boys aged seven to nine, comparing disruptive behavior to heart rate. Distinguishes this study from earlier ones that found relationship between low base heart rates and low reactivity to mild stress among high school boys. Reports that this study disproves prediction that results would be…