Key points are not available for this paper at this time.
C. Daniel Batson, Jay S. Coke, Fred Chard, Debra Smith, Antonia Taliaferro, Generality of the "Glow of Goodwill": Effects of Mood on Helping and Information Acquisition, Social Psychology Quarterly, Vol. 42, No. 2 (Jun., 1979), pp. 176-179
Batson et al. (Fri,) studied this question.