According to upsurge in the issues of students’ smartphone-internet addiction, this study aims to suggest policy implications based on the empirical results of harmful effects derived from smartphone-internet addiction on school violence. Thus, this study analyzed relations between elementary and middle school students’ smartphone-internet addiction and mental health, their effects on school violence experiences, and the mediating effects of social relationships.
Participants were 573 elementary school students in 5th grade (271 females, 297 males, 5 no response), and 637 middle school students in junior year (126 females, 510 males, 5 no response). This study measured smartphone-internet addiction, depression, aggression·impulsiveness, social relationships, school violence experiences, and analyzed the relations among those factors. The results showed high associations among smartphone-internet addiction, depression, and aggression·impulsiveness, as well as effects of those factors on social relationships and school violence experiences. Also, the results revealed the mediating roles of friends and teachers between mental health and school violence. This study suggests the importance of enhancing mental health to prevent smartphone-internet addiction, as well as of making integrative policies against smartphone-internet addiction and school violence.