Attention bias modification training (ABMT) is a a variation of attention tasks to modify attentional biases, in which a probe always appears in the location of relatively positive stimuli after the two stimuli, one neutral and one emotional, were simultaneously presented.

Participants complete 8 sessions (320 trials each with 20 minutes) over two weeks of neutral ABMT to shift attention toward neutral, in which a probe appeared in the location of neutral with 90% probability, and sadness-related with 10% probality. At a 9-week follow-up, participants completed 4 more sessions (480 trials each with 30 minutes)over two weeks of positive ABMT to shift attention toward positive words,in which a probe appeared in the location of 67% positive or 33% neutral.

The placebo ABMT was identical to the active ABMT, but shifted toward neutral (50%) or sad (50%) stimuli equally often (i.e., 50/50 training).

During a two-week period, 8 sessions of a modified dot probe task for attentional bias modification training (ABMT) condition, 8 sessions of a classic dot probe task for placebo training (PT) condition.

Depressive symptom accounts measured by Kiddie Schedule for Affective Disorders and Schizophrenia for School-Age Children.

depressive severity measured by the construct interview of the Schedule for Affective Disorders and Schizophrenia for School-Age Children(K-SADS)

symptoms measured by the Center for Epidemiological Studies Depression Scale (CES-D), State-Trait Anxiety Inventory-Trait(STAI-T)，Rumination Response Style（RRS)，Suicidal Ideation Questionnaire（SIQ）