LAUSR

The current study examined the bidirectional relationship between parental psychological control and problematic smartphone use (PSU) in early Chinese adolescence using a two time-points repeated-measures study and explored the role of psychological security and insomnia in the relationship between parental psychological control and subsequent PSU in early adolescence. The sample consisted of 2128 fourth- and fifth-grade students (55.69% male, age = 9 to 13, Mage ± SD = 10.91 ± 0.80) who participated in two measurements and completed questionnaires about parental psychological control, PSU, psychological security and insomnia. The results indicated that: (1) Autoregressive cross-lagged models showed a reciprocal relationship between parental psychological control and PSU severity in early adolescence. (2) Both psychological security and insomnia mediate the link between parental psychological control and subsequent PSU severity. (3) Psychological security and insomnia play serial mediating roles between parental psychological control and subsequent PSU severity. These findings indicate that reducing parental psychological control, boosting psychological security and alleviating insomnia symptoms in adolescents are all conducive to decrease PSU severity in early adolescence.