1. A single-blind randomized controlled trial is conducted. 30 people, assigned to SRI group (Social Reward Intervention group) , will be received a psychological self-help program aimed at enhancing social reward sensitivity.
2. Assessments including standardized scales, behavioral tests, and neuroimaging are conducted once before and once after the intervention.
3. During the course, participants will receive twice-weekly online guidance sessions totaling eight sessions, which mainly focus on practicing ACT (Acceptance and Commitment Therapy) psychological skills, checking progress in social reward learning, and monitoring course advancement. Additionally, one to two offline group discussions are held regularly to enhance treatment adherence and ensure active participation in the self-help program.
4. The entire intervention lasts approximately one month, with follow-up assessments conducted at 3, 6, and 12 months post-intervention.

1. A single-blind randomized controlled trial is conducted. 30 people, assigned to Control group, was provided with standard educational courses introducing general knowledge about Internet Gaming Disorder, while the others are assigned to SRI group (Social Reward Intervention group). Both groups have equivalent learning durations and delivery formats.
2. Assessments including standardized scales, behavioral tests, and neuroimaging are conducted once before and once after the intervention.
3. During the course, participants will receive twice-weekly online guidance sessions totaling eight sessions.
4. The entire intervention lasts approximately one month, with follow-up assessments conducted at 3, 6, and 12 months post-intervention.

Based on previous research, this study has made significant innovations and optimizations within the traditional framework of Acceptance and Commitment Therapy (ACT). We have specifically developed a systematic self-help training module aimed at enhancing social reward, which includes components such as social scenario experience, social skills training, and the improvement of social reward sensitivity.

A single-blind randomized controlled trial will be conducted, dividing IGD participants into two groups. The SRI group (Social Reward Intervention group) will receive a psychological self-help training program designed to improve social reward, while the other (Control group) will receive a course introducing general knowledge about Internet Gaming Disorder. Both groups will have identical learning durations and modalities. The self-help training consists of 8 sessions, delivered twice weekly through a blended online and offline learning format, lasting approximately one month.

The severity of gaming disorder was assessed using the Gaming Disorder Screening Scale (GDSS), which consists of 18 Likert-scale items. Each item has four response options (1 = never; 2 = sometimes; 3 = often; 4 = always), with a total score range of 18 to 72. Based on receiver operating characteristic (ROC) analysis using ICD-11 as the gold standard, a total score of ≥47 indicates a high risk of gaming disorder

Social reward function was measured using the Social Pleasure subscale of the Multidimensional Anhedonia Scale. This subscale includes 4 items, and participants were first asked to list two current or past social activities that brought them happiness, then to respond to each item assessing aspects such as willingness to engage in these activities and the pleasure experienced during participation.

Executive function was evaluated using the Behavior Rating Inventory of Executive Function-Adult Version (BRIEF-A), comprising 75 items scored on a 3-point Likert scale ranging from "never" to "often." Higher scores on the Global Executive Composite (GEC) reflect greater executive function impairment.

Behavioral measures included performance indices from the Social Incentive Delay Task and a Social Reward-modified Stop-Signal Task, including hit rate, reaction time for correct hits, Stop-Signal Delay (SSD), and Stop-Signal Reaction Time (SSRT). A reduced hit rate and prolonged reaction time under social reward cue conditions in the Social Incentive Delay Task indicate impaired social reward processing. In the Stop-Signal Task, a higher SSD and shorter SSRT under reward conditions compared to no-reward groups suggest that social reward enhances cognitive control.