The present study expands on previous research regarding the correlation
between parental overprotection (POP) and non-suicidal self-injury
(NSSI) in Chinese adolescents. Drawing from self-determination theory,
the study aims to investigate the mediating effect of psychological need
satisfaction on the relationship between POP and adolescent NSSI, as
well as the potential moderating effect of anger expression. A sample of
1248 adolescents (Mage = 13.34 years; SD = 0.96 years) completed
anonymous questionnaires to measure the study variables. The results of
the regression analysis indicate that: (1) the positive link between POP
and adolescent NSSI is mediated by low psychological need satisfaction;
(2) this indirect relationship is particularly pronounced in adolescents
who report high levels of anger expression. These findings suggest that
psychological need frustration may serve as a mechanism linking POP to
adolescent NSSI, and that adolescents who tend to express more anger may
be at an increased risk for engaging in NSSI. Systemic family therapy is
recommended for clinicians and consultant to help them better understand
the adolescents with NSSI in overprotective family system and adopt
targeted intervention programs.