Background: With the increasing popularity of smartphones, mobile phone addiction in university students has attracted widespread societal attention. Previous studies showed that family functioning and mobile phone addiction are related. However, the potential mechanisms involved in this relationship are unknown. This study examined the mediating effect of loneliness and the moderating effect of capacity to be alone on the relationship between family functioning and mobile phone addiction.Methods: A total of 1,580 university students were recruited. A cross-sectional study design and online questionnaire survey were employed to measure demographic variables, family functioning, loneliness, capacity to be alone, and mobile phone addiction in university students.Results: Family functioning is a significantly negative predictor of mobile phone addiction in university students, and loneliness has a mediating effect on the relationship between family functioning and mobile phone addiction. The capacity to be alone has moderating effects on the relationship between family functioning and loneliness and between family functioning and mobile phone addiction, and these correlation is stronger in university students with a low capacity to be alone.Conclusion: The moderated mediation model in this study improves understanding of the correlation between family functioning and mobile phone addiction in university students. Education professionals and parents should pay particular attention to family functioning in mobile phone addiction, particularly university students with low capacity to be alone.

This randomized controlled trial examined whether short-term intensive mindfulness training is associated with changes in executive task performance and prefrontal hemodynamic responses in elite athletes. Twenty-eight elite badminton athletes were randomly assigned to a 10-day mindfulness intervention or an active control (regular training plus neutral video viewing). Before and after the intervention, athletes completed the Tower of London (TOL) task while prefrontal responses were recorded using fNIRS; task accuracy (ACC) and reaction time (RT) were assessed. Neural responses were quantified using Hbdiff (HbO–HbR) and a neural efficiency (NE) index, and mindfulness was assessed with the Five-Facet Mindfulness Questionnaire (FFMQ). The intervention group showed increased FFMQ scores, but no significant Group × Time interaction was observed for TOL-related ACC or RT. Under low cognitive load, CH15 (right vlPFC) showed a lower hemodynamic response, and the CH15 NE index showed a higher NE index than the control group; the CH15 (right vlPFC) response was positively associated with RT. These findings add to evidence on mindfulness-related modulation of vlPFC (CH15) responses under low cognitive load during executive task performance, although the absence of robust behavioral changes warrants cautious interpretation.