Abstract
INTRODUCTION: Youth digital engagement serves as a notable avenue for the expression of emotion and the construction of self among today's youth. This study aims to examine the patterns of youth online emotional expression and their association with individual psychological traits, particularly depressive tendencies. METHODS: 23,966 Weibo posts published by 103 active youth users were sampled and analyzed. An integrative framework combining Russell's Circumplex Model with multi-level thematic analysis was applied to code each post for valence, arousal, trigger type and coping strategy. Youths also completed a standard depression-screening scale; scores were used to contrast high- versus low-depressive trait sub-groups. RESULTS: The findings reveal that youth online emotional expression overall is characterized by a self-focused nature, high pleasure, and high arousal. The study also found that individual psychological traits influence emotional expression patterns. Individuals with depressive tendencies showed a significant propensity for higher emotional arousal expression and more no-trigger expression. Furthermore, no-trigger expression plays a mediating role in their emotional expression mechanism. DISCUSSION: The study provides an integrative framework for youth digital engagement and highlights "no-trigger" expression as a mediator in the framework. These findings can guide early detection efforts and contribute to designing targeted digital mental health supports, as well as informing guidance for families and platform managers.