Association of chronotype and social jetlag with human non-verbal intelligence

ABSTRACT

The aim of this study was to evaluate the effects of chronotype and social jetlag (SJL) on intelligence. Subjects were aged 14–25 years (n = 1008). A significant effect of intelligence on academic performance, as measured by the Raven’s Standard Progressive Matrices test, was found (F_2,917 = 11.75, P < 0.0001, η² = 0.03). When SJL was less than 2 hours, the intelligence of people with late chronotype was found to be higher than that of subjects with early and intermediate chronotypes (F_2,305 = 3.12, P < 0.05, η² = 0.02). A negative effect of SJL on the results of intelligence testing was noted only in subjects with late chronotype (F_2,536 = 2.61, P < 0.05, η² = 0.02). Our data suggest that people with late chronotype have a higher level of intelligence, but these advantages disappear when SJL ≥2 hours.

KEYWORDS:

• Chronotype
• social jetlag
• non-verbal intelligence

Declaration of interest

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

Funding

This work was supported by the Program of UD RAS Grant No. 15-3-4-50 (MFB).

Additional information

Funding

This work was supported by the Program of UD RAS Grant No. 15-3-4-50 (MFB).

Notes on contributors

A. S. Panev

A. S. Panev and M. F. Borisenkov contributed equally to this work.

M. F. Borisenkov

A. S. Panev and M. F. Borisenkov contributed equally to this work.