1. Batson, C. D. (1987). Prosocial motivation: Is it ever truly altruistic? In L. Berkowitz (Ed.), Advances in experimental socialpsychology (Vol. 20, pp. 65-122). New York: Academic.
2. Negative-state relief and the empathy—altruism hypothesis.
3. Batson, C. D. & Coke, J. S. (1981). Empathy: A source of altruistic motivation for helping? In J. P. Rushton & R. M. Sorrentino (Eds.), Alrruism and helping behavior: Social, personality, anddevelopmental perspectives (pp. 167- 187). Hillsdale, NJ: Lawrence Erlbaum Associates, Inc.
4. Factors relevant to the validity of experiments in social settings.
5. Insights from sadness: A three-step model of the development of altruism as hedonism