title: Menstrual cycle effects on performance of mental arithmetic task.
abstract: The purpose of this research was to identify the relationship between task performance and menstrual cycle. The difference of performance on menstrual cycle phase was investigated. The task was the mental arithmetic task which involved the non-sequential and higher order cognitive processes. The duration of the experiment was twenty minutes. Two-way analysis of variance by repeated-measures design was used to examine the differences in task performance between phases and temporal variations. Results showed that there was a significant difference in correct input time during temporal variations though there was no significant difference between phases. Moreover, the relationships between phases and intra-individual variations in task performance were examined using coefficient of variance (CV). CVs were plotted in three dimensions to examine the relationships between intra-individual variations and phases. Based on CVs, the subjects who showed differences were classified into two groups: those with a small difference in three phases and those with a difference every phase. The phase which indicated large CV changed with individuals.
authors.affiliation: Department of Ergonomics, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan. kkasa@med.uoeh-u.ac.jp
authors.forename: Keiko
authors.initials: K
authors.lastname: Kasamatsu
authors.forename: Satoshi
authors.initials: S
authors.lastname: Suzuki
authors.forename: Michiko
authors.initials: M
authors.lastname: Anse
authors.forename: Mariko F
authors.initials: MF
authors.lastname: Funada
authors.forename: Kyoko
authors.initials: K
authors.lastname: Idogawa
authors.forename: Satoki P
authors.initials: SP
authors.lastname: Ninomija
mesh_terms: D000328:Adult; D003071:Cognition; D005260:Female; D006801:Humans; D008433:Mathematics; D008597:Menstrual Cycle / Q000523:psychology*; D013647:Task Performance and Analysis