Longitudinal associations among basic psychological need satisfaction at school, self-esteem, and suicidal ideation from middle childhood to early adolescence: Disentangling between­ and within­person associations.

INTRODUCTION: The current study aimed to examine the longitudinal associations among basic psychological need satisfaction at school (BPNSS), self-esteem, and suicidal ideation (SI), including whether self-esteem functioned as a mediator of the relations between BPNSS and SI at the within-person level after disentangling between- and within-person associations encompassing middle childhood to early adolescence. METHODS: A total of 650 Chinese students (53.54% boys, Mage = 9.95, SD = 0.75 at Time 1) completed measures on four occasions across 1.5 years, using 6-month intervals. Random intercept cross-lagged panel models were applied to disaggregate between- and within-person effects, thus providing greater confidence in elucidating the causal relations among study variables. RESULTS: The results showed that at the within-person level: (a) BPNSS negatively predicted SI; (b) BPNSS positively predicted self-esteem; (c) Self-esteem negatively predicted SI; and (d) BPNSS indirectly predicted SI via self-esteem. CONCLUSION: These findings advanced the literature by demonstrating longitudinal associations among BPNSS, self-esteem, and SI at the within-person level, and highlighting the significance of distinguishing between- and within-person effects in developing prevention and intervention programs aimed at reducing SI over time from middle childhood to early adolescence.