It has been well documented that rumination has a negative effect on sleep quality. However, the mechanism underlying this effect remains unclear. This study investigated the negative effect of rumination on sleep quality mediated by negative affect and bedtime procrastination. In the current study, Pittsburgh Sleep Quality Index, Ruminative Responses Scale, Negative Experience Scale, and Bedtime Procrastination Scale were administered to a sample of 1103 college students recruited from an online survey platform, among whom 63% were female. The...