Research has revealed that mobile phone addiction was a risk factor for poor sleep quality, however, little is known about the underlying mechanisms that may mediate or moderate this association. This study examined the mediating role of rumination and moderating role of mindfulness in the association between mobile phone addiction and sleep quality. A sample of 1196 Chinese adolescents was recruited to complete measures of mobile phone addiction, sleep quality, rumination and mindfulness. Results showed that rumination partially mediated the r...