| Abstract: | Abstract The self-reported predicted and actual day of menstrual onset were compared for 107 female volunteers. The differences between predicted and actual day of menstrual onset were compared by categorizing women into the ovulatory, premenstrual, and menstrual phases separately based on their predicted and actual days of menstrual onset. A main effect for phase suggested that menstrual women were less accurate in predicting menstrual onset. Thus, the degree of inaccuracy differed by phase and varied as a function of whether predicted or actual menstrual onset date was used to assign women to phases. These data provide a more precise indication of the degree of unreliability of self-reports and suggest a phase-accuracy connection which may be influenced by a number of factors, particularly recall of last menstrual onset. |
