Morningness and eveningness personality: A survey in literature from 1995 up till 2006
ABSTRACT The article investigates central aspects of Morningness–Eveningness personality, focusing on recent literature in this field from 1995. A review was written by Kerkhof (1985) about interindividual differences in the human circadian system, where the author reviewed previous studies which had dealt with some aspects of Morningness–Eveningness personality (questionnaires, circadian rhythms, sleep-wake cycle, introversion–extraversion, age, sex, and the impact of disturbance) and a review was written by Tankova, Adan, and Buela-Casals (1994) about circadian typology and individual differences, where aspects of personality, age, sex, shift work, and life habits were examined. This paper, with reference also to previous studies, attempts to give an updating survey of some issues of the literature in the field of Morningness–Eveningness personality from 1995 up to 2006; various aspects of Morningness–Eveningness personality are taken into consideration: personality traits, biological, and genetic issues, Morningness–Eveningness preferences in Youngs and Adults, gender, cognitive abilities, work schedules, life habits, and cross-cultural research.
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ABSTRACT: Sleepiness is a major public health problem associated with motor vehicle crashes, occupational accidents, decreased productivity, and interpersonal problems. It can be influenced by many factors, including the individual's circadian rhythm. The objective of this study is to assess the correlation between the morningness/eveningness dimension and daytime sleepiness in medical school students. This is a cross-sectional study; 310 subjects (123 women and 187 men, M age 20.5 +/- 1.9 yr.) completed a questionnaire on use of drugs, diagnostic diseases, sleeping habits, the Morningness/Eveningness Questionnaire and the Epworth Sleepiness Scale. The only variable related to daytime sleepiness was the morningness/eveningness dimension (r = -.18, p=.002). Questions with higher coefficients of discrimination between the morning and the evening chronotype were "Lying down to rest in the afternoon when circumstances permit" (.61), "Sitting and reading" (.53), and "As a passenger in a car for an hour without a break" (.53). The implications of the findings are discussed.Psychological Reports 11/2003; 93(2):427-34. · 0.44 Impact Factor
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ABSTRACT: The bipolar dimension of morningness-eveningness refers to the preferred times of day for achieving various activities (i.e. the phase of the circadian clock). It is validated from a biological point of view, associated with at least one gene and heritable through an epistatic mechanism. It has been used as a proxy to study the relationships between the circadian system, personality and psychopathology: there is a correlation between the evening orientation and depression, extraversion and, probably, impulsivity. Furthermore, there is a possible relationship with temperament in children as theorized by Thomas and Chess. In this paper, we expanded on the hypothesis that impulsive subjects are low in morningness by performing a factor analysis of the Composite Scale of Morningness, Cloninger's temperament and character inventory, and Spielberger's trait anxiety inventory in a sample of 129 males. The results can probably be extended to women. Morningness is negatively correlated with novelty seeking (which includes an impulsivity facet), positively correlated with persistence, and independent of character dimensions and trait anxiety. Future research may focus in the involvement of the circadian system in these personality dimensions and facets, and the benefits of adding chronotherapic manipulations in the treatment of the personality disorders.European Psychiatry 05/2004; 19(2):79-84. · 3.29 Impact Factor
Article: Gender and Circadian TypologyBiological Rhythm Research - BIOL RHYTHM RES. 01/2002; 33(3):261-269.