Cr. Gruner et al., EVALUATIVE RESPONSES TO JOKES IN INFORMATIVE SPEECH WITH AND WITHOUT LAUGHTER BY AN AUDIENCE - A PARTIAL REPLICATION, Psychological reports, 74(2), 1994, pp. 446-446
Mean responses of 39 students shown a videotaped speech with laughter
were higher than those of 33 students viewing the speech without laugh
ter, thereby confirming prior work.