Validity of the Japanese Version of the Morningness-Eveningness Questionnaire

Abstract

The Morningness-Eveningness (ME) scores and body temperature readings were collected from 25 students to assess the validity of Japanese version of Horne-Östberg's ME questionnaire. Significant differences between morning and evening types were found for acrophase (peak time) of body temperature, and ME score was significantly correlated with peak time of body temperature. These results suggest that the Japanese version of the questionnaire was valid.