Reliability and validity of the Korean version of Morningness-Eveningness Questionnaire in adults aged 20-39 years

Morningness-Eveningness (ME) can be defined by the difference in individual diurnal preference observed from general behavioral patterns including sleep habits. The Horne & Östberg Morningness-Eveningness Questionnaire (MEQ) has been used for classifying ME types. We examined the reliability of...

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Bibliographic Details
Published in:Chronobiology international 2014-05, Vol.31 (4), p.479-486
Main Authors: Lee, Jung Hie, Kim, Seong Jae, Lee, Se Yong, Jang, Kwang Ho, Kim, In Soo, Duffy, Jeanne F.
Format: Article
Language:English
Subjects:
Actigraphy
Activity Cycles
Adult
Age Factors
Circadian Rhythm
Female
Habits
Humans
Korean MEQ
Male
ME type
Reproducibility of Results
Republic of Korea
Sleep
sleep-wake rhythm
sleep-wake timing
Surveys and Questionnaires
test-retest reliability
Time Factors
Wakefulness
Workload
Young Adult
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Summary:Morningness-Eveningness (ME) can be defined by the difference in individual diurnal preference observed from general behavioral patterns including sleep habits. The Horne & Östberg Morningness-Eveningness Questionnaire (MEQ) has been used for classifying ME types. We examined the reliability of a Korean version of the MEQ (Korean MEQ) and verified its validity by comparing responses on the Korean MEQ to objectively-recorded sleep-wake rhythms. After translating and back translating the MEQ from English into Korean, we examined the internal consistency of 19 items of the Korean MEQ in 91 subjects, and the test-retest reliability in 21 subjects who took the Korean MEQ twice, 4 weeks apart. The Korean MEQ was then administered to 1022 young adult subjects. A subset of 46 morning, neither, and evening type subjects took part in a validation study in which their rest-activity timing was collected by actigraphy for 7 days. Cosinor analyses on these data were done to obtain the acrophase and amplitude of the sleep-wake rhythm. Cronbach's alpha of the total scores from the Korean MEQ was 0.77, and the test-retest reliability intra-class correlation coefficient was 0.90 (p 
ISSN:0742-0528
1525-6073
DOI:10.3109/07420528.2013.867864