Horne JA and Östberg O. A self-assessment questionnaire to determine morningness-eveningness in human circadian rhythms. International Journal of. J Biol Rhythms. Feb;19(1) Validation of Horne and Ostberg morningness-eveningness questionnaire in a middle-aged population of French . “Validation of Horne and Ostberg Morningness-Eveningness Questionnaire in a Middle-Aged Population of French Workers”. Journal of Biological Rhythms

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Original study in student population years. Validated with oral temparature curves. Morning types had a significantly earlier peak time in the circadian peak than Evening types and tended to have a higher daytime temperature and lower post peak temperature. When re-examined, original criteria of Horne and Ostberg studies showed different validity in different populations. In a validation study in a sample of middle-aged workers- non-students: In 14 studies that used the MEQ in individuals without a diagnosis of cricadian rhythm disorder and used objective circadian phase marker testing e.

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Morningness Eveningness Questionnaire – Are you an Owl or a Lark?

May consider using alternative modified versions if population does not have regular diurnal schedules, example: Reduced versions of the MEQ evenintness been reported in some studies e. The American Thoracic Society improves global health by advancing research, patient care, and public health in pulmonary disease, critical illness, and sleep disorders.

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Morningness Eveningness Questionnaire – Are you a Night Owl or a Morning Lark?

The sum gives a score ranging from 16 to 86; scores of 41 and below questionnair “evening types”, scores of 59 and above indicate “morning types”, scores between indicate “intermediate types”; A self-assessment questionnaire to determine morningness-eveningness in human circadian rhythms”.

Int J Chronobiol 4 2: Taillard J, et al.

Journal of Biological Rhythms 19 1: Sack R, et al. Cavallera GM, Boari G. Zacharia T, et al.


American Thoracic Society – Morningness -Eveningness Questionnaire (MEQ)

Int Tinnitus J 19 1: Lee JH, et al. Chronobiol Int 31 4: Diaz-Morales JFet al.

Limitations Questionaires assumes all individuals are on regular diurnal schedules Link to the questionnaire if available http: Updated by Vidya Krishnan The last date of update Assess morningness and eveningness.