Related Experiment Video
Updated: Mar 6, 2026

The Sleep Nullifying Apparatus: A Highly Efficient Method of Sleep Depriving Drosophila
Published on: December 14, 2020
Social jet lag: Sleep-corrected formula
1a Department of Psychometrics and Psychological Diagnosis, Faculty of Psychology , University of Warsaw , Warsaw , Poland.
Abstract:
Social jet lag is a term describing misalignment between social and biological times. In this article, it is argued that the currently used formula for social jet lag captures not only this misalignment, but also sleep debt resulting from sleep deprivation during workdays. It is proposed to adopt the sleep-corrected formula for social jet lag, which takes the form of the difference between the sleep onset on free days and workdays in the case of subjects with longer sleep and later (or equal) sleep onset on free days compared to workdays; it takes the form of the difference between the sleep offset on free days and workdays for subjects with longer sleep and earlier (or equal) sleep offset on workdays compared to free days.
Related Concept Videos
Insufficient Sleep and Sleep Deprivation
Sleep deprivation is a more severe form of sleep loss...
Substance Use Disorders Affecting Sleep
Understanding the concepts of physical dependence,...
Management of Insomnia
REM Sleep Behavior Disorder
RBD is significantly associated with...
Understanding Sleep
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
Sleep-Wake Cycles
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:

