Effects of the Menstrual Cycle on the Performance of Complex Perceptual-Psychomotor Tasks

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Abstract
Efforts in support of providing equal employment opportunities have created a serious interest in factors which may affect the potential aeronautical adaptability of women. The possible effects of the significant physical and hormonal changes associated with the menstrual cycle have been a focal point of considerable coacera. This study assesses an individual's ability to perform complex, perceptual-psychomotor tasks during different phases of the menstrual cycle. Seventeen women served as paid volunteer subjects. All were between 20 and 30 years of age with a mean age of 24 years. Each woman was tested during the premenstruum (3 or 4 days prior to menstrual flow), during the menstrual flow, and during the intermenstrual phase of the cycle. In addition, data were collected on the use of oral contraceptives and on the severity and prevalence of individual menstrual cycle symptomatology as measured by the Menstrual Distress Questionnaire. The perceptual-psychomotor data were used to evaluate the effects of menstrual cycle and oral contraceptives on performance under stress. The data were also used to test Dalton's hypothesis that the lethargy the premenstruum and menstruation is responsible for lowered judgment and slow reaction time which might result in accidents. The results of the study indicated that there were no performance decrements associated with the menstrual cycle or use of oral contraceptives and failed to support Dalton's hypothesis.