Early adolescent smartphone dependence has emerged as a significant social and public health issue. Previous research showed that multiple ecological risks including family, school, and peer risk factors played important roles in early adolescent smartphone dependence. However, these studies have examined risk factors individually rather than examining the cumulative risk effect. Based on the Ecological Systems Theory and Risk-Protective Factor Theory, the present study focused on the longitudinal association between cumulative ecological risk and early adolescent smartphone dependence. We tes...
