Psychometric properties of the Persian version of the reduced Morningness-Eveningness Questionnaire: Further evidence

Abstract

Circadian types are related to many physiological, cognitive, and behavioral variables and, therefore, a need for a questionnaire in Farsi language to assess those preferences has emerged. The present study aimed at exploring psychometric properties of the reduced version of the Persian Morningness‐Eveningness Questionnaire (rMEQ). Participants were 268 students recruited from two different universities. Three questionnaires were used to investigate the additional validity data of the Persian version of the rMEQ: Beck Depression Inventory (BDI‐II), Oxford Happiness Questionnaire (OHQ), and General Health Questionnaire (GHQ‐12). The correlations between the rMEQ and the three other questionnaires were −0.45, 0.48, −0.41, respectively. Moreover, the factor analysis of the rMEQ resulted in a single‐factor solution and the Cronbach's α was 0.71. In sum, the Persian rMEQ seemed to be a reliable and valid instrument to differentiate circadian types. We suggest that future studies focus on test‐retest reliability of the rMEQ and an analysis of its unidimensionality with other methods like Item‐Response Theory (IRT).

Chronotype assessment of the Bengalese adolescents: an observational study using a Bengali version of the reduced Morningness-Eveningness Questionnaire (rMEQ)

“…We demonstrate that the Bengali version of the rMEQ has an acceptable reliability index and similarities with other versions (Chelminsky et al 2000;Caci et al 2009;Carciofo et al 2012;Randler 2013;Rahafar et al 2015). Dimension reduction technique also demonstrated the rMEQ coherent to the other versions of the rMEQ (Jankowski 2013;Randler 2013;Rahafar et al 2015).…”

“…Considering the limitations of original MEQ developed by Horne and Östberg (1976) such as limited reliability, heterogeneity in the morning cut-off score (Rahafar et al 2015) and time-consuming nature (Randler 2013), Adan and Almirall (1991) developed the reduced version of morningness-eveningness scale (rMEQ), a 5-item scale that constituted items 1, 7, 10, 18 and 19 from original MEQ. rMEQ asks participants about their preferred wake up time (rMEQ1), the degree of tiredness during first half hour after wake up in the morning (rMEQ2), sleep time at night (rMEQ3), peak personal efficiency time (rMEQ4) and self-estimation of chronotype (rMEQ5).…”

“…"approximately what time would you get up if you were entirely free to plan your day?") (Terman et al 2001),different cut off scores (Di Milia et al 2013) and questionable consistency (Di Milia et al 2013), it has also been established to be a reliable measure with acceptable psychometric properties and convergent validity (Adan & Almirall 1991;Caci et al 2009;Randler 2013;Rahafar et al 2015). Moreover, rMEQ is particularly useful in large-scale epidemiological studies, especially those with multiple dimensions where large questionnaires are impossible to administer (Jankowski 2013).…”

Temporal associations between morningness/eveningness, problematic social media use, psychological distress and daytime sleepiness: Mediated roles of sleep quality and insomnia among young adults

“…More specifically, the five items assess comfortable rising time, morning freshness, retiring time, subjective peak time and self‐evaluation of chronotype (Ágoston, Urbán, Rigó, Griffiths, & Demetrovics, 2019). A review shows that the rMEQ has satisfactory psychometric properties (Di Milia, Adan, Natale, & Randler, 2013); the psychometric properties of the Persian rMEQ also have been comprehensively evaluated and confirmed among university students (Rahafar, Meysam, Sadeghpour, Heidari, & Kasaeian, 2015). The internal consistency of the rMEQ in the present study was good (α = 0.79).…”

Morningness-eveningness in a large sample of German adolescents and adults

“…The original version was based on 19 items in a Likert type response format. Adan and Almirall (1991) developed a short form out of this original MEQ which was then applied in different countries, such as Spain (Adan and Almirall, 1991), Italy (Natale et al, 2006), Germany (Randler, 2013), Iran (Rahafar et al, 2015) and India (Biswas et al, 2014; see also Di Milia et al, 2013 for an overview). The rMEQ has good psychometric properties and validity (Di Milia et al, 2013).…”