stimulation that producing question disappeared. This experiment needs high awaking conditions, therefore we supposed that it was necessary for subjects the more concentration than the experiment 1. Judging from the examination of difference with averaged value, we supposed that it was possible to group the subjects into the type were easy to influence by the menstrual cycle such as subject B, C, D, F or were not such as subject A, E, G. As a result of questionnaire, there were negative feelings and behavior in the menstruation. As for the questionnaire and character examination in the each subject, we supposed that it was possible to group into the subjects complain of symptoms in psychological change or in physical change by means of character type.
As for the classification of the subjects in the experiment results, it was possible to classify into a type from which task performance was influenced easily by the menstrual cycle and a type not so, and type influenced easily by stimulation which is that problem disappears and type not so. As a results of the factor analysis, there were the differences of symptoms by each phase. We supposed that there was the relationship between the results of Y-G character examination and the answer of the questionnaire. We couldn't investigate about individual differences enough. However, in future it is necessary to divide into individual classes and to investigate the various individual characteristic and the differences of the effect by the menstrual cycle.
Keiko Kasamatsu et al., Research concerning influence on work efficiency of analog and digital VDT work caused by menstrual cycle, Proceedings of WWDU'97 Tokyo, p47-48, 1997
Rudolf H. Moos, Ph.D., The Development of Menstrual Distress Questionnaire, PSYCHOSOMATIC MEDICINE, Vol. XXX, No. 6, 1968