To explore the relationship between cumulative ecological risk and junior middle school student’s online aggressive behavior.

In 2023, convenience sampling method was adopted. A questionnaire survey was conducted among 340 junior middle school students from 2 middle schools in Tongliao City, Inner Mongolia Autonomous Region with cumulative ecological risk scale, normative beliefs about aggression scale and online aggressive behavior scale, and the mediation effect was tested by non-parametric percentile Bootstrap method with bias correction.

The cumulative ecological risk was positively correlated with online aggressive behavior and normative beliefs about aggression (r=0.51,r=0.53,P<0.01). There was a significant positive correlation between normative beliefs about aggression and online aggressive behavior (r=0.73,P<0.01). Online aggressive behavior had significant positive regression on cumulative ecological risk and normative beliefs about aggression (β=0.17,95%CI:0.09-0.26,β=0.63,95%CI:0.56-0.70,P<0.001), and normative beliefs about aggression had significant positive regression on cumulative ecological risk (β=0.52,95%CI:0.44-0.60,P<0.001). Normative beliefs about aggression played a partial mediating role between cumulative ecological risk and online aggressive behavior, and the mediating effect was 0.33(95%CI:0.27-0.40), accounting for 64.71% of the total effects.

Cumulative ecological risk can not only directly affect the online aggressive behavior, but also indirectly affect the online aggressive behavior of junior middle school student through the normative belief about aggression. In the future, the level of online aggressive behavior can be regulated by intervening the normative belief about aggression.