The role of self-control and chronotype in predicting bedtime procrastination

Bedtime procrastination has emerged as a significant contributor to insufficient sleep, and both chronotype and self-control have received increasing attention as potential predictors. This study examined whether these two factors independently predict bedtime procrastination after controlling for each other, and explored which factor shows a stronger association. Participants were 249 individuals aged 18–27 who completed self-report measures of bedtime procrastination, self-control, chronotype. Multiple regression analysis revealed that self-control negatively predicted bedtime procrastination, whereas chronotype positively predicted it. The standardized regression coefficients for self-control and chronotype did not differ significantly in absolute value, suggesting that neither factor was clearly dominant. These findings indicate that adjusting daily routine based on chronotype may help reduce bedtime procrastination and that planning strategies targeting self-control are also important.