Older women tended to laugh less frequently than did younger women, but this age difference was not found in men

Daily occurrence of laughter: Relationships with age, gender, and Type A personality. Rod A. Martin, Nicholas A. Kuiper. Humor - International Journal of Humor Research 12(4):355-384, January 1999. DOI 10.1515/humr.1999.12.4.355

Abstract: This study examined the circumstances surrounding the natural occurrence of laughter in everyday life. Eighty community participants (50 women and 30 men), ranging in age from 17 to 79, each completed a daily laughter record for three days, along with self-report measures of laughter responsiveness, coping humor, and Type A personality characteristics. Laughter incidents were coded according to time of day, source and initiator of laughter, and whether the individual was alone or with others. On average, participants reported approximately 18 daily incidents of laughter, but with wide individual variation being evident (0 to 89 incidents per day). Frequency of laughter also generally increased throughout the day, being most pronounced in the evenings. The most prominent source of daily laughter was spontaneous situational laughter, with "canned" jokes accounting for the least amount of naturally generated laughter. In accord with the primarily social nature of laughter, most incidents of laughter occurred in the presence of others, and were also initiated by others. Overall, men and women did not differ in the frequency with which they laughed. However, gender differences did emerge when age was taken into account. Older women tended to laugh less frequently than did younger women, but this age difference was not found in men. In addition, for both men and women, older individuals did not show the general increase in frequency of laughter during the evening. Gender differences also emerged in the correlations between total laughter frequency and personality variables. For example, a higher frequency of daily laughter was associated with greater Type A characteristics in men, but with fewer Type A characteristics in women. These findings are discussed in terms of possible gender differences in the meaning and function of laughter.