Relationship between circadian typology and functional and dysfunctional impulsivity.
The present study explores the relationships between functional and dysfunctional impulsivity factors, circadian typology, and sex. A sample of 850 university students (396 men) aged between 18 and 33 yrs of age completed the Dickman's Impulsivity Inventory (DII) and reduced morningness-eveningness questionnaire (rMEQ). Factorial analysis showed a dimensional clustering with satisfactory item saturation for both dimensions of impulsivity, especially in men and evening-type. Men presented higher values than women for functional and dysfunctional impulsivity, while morning-type subjects obtained lower scores in dysfunctional impulsivity than the neither- and evening-types. An interactive effect between circadian typology and sex was obtained for dysfunctional impulsivity. Higher scores in men for dysfunctional impulsivity were found in neither- and evening-types, while no significant differences were obtained between men and women in the morning-type group. The morning-type typology can be considered a protective factor for impulse control disorders, especially in men, but further research is needed on the clinical and neurobiological implications of our results.
Department of Psychiatry and Clinical Psychobiology, School of Psychology, University of Barcelona, Barcelona, Spain. aadan@ub.edu
Ana
A
Adan
Vincenzo
V
Natale
Hervé
H
Caci
Gemma
G
Prat
D007174:Disruptive, Impulse Control, and Conduct Disorders; D004522:Educational Status; D005260:Female; D006801:Humans; D008297:Male; D011795:Surveys and Questionnaires; D055815:Young Adult