To test whether high working memory load can effectively reduce the craving for IGD.

This project is to use 1-back task and 3-back task to reduce the craving of internet gamers. To test whether high working memory load can effectively reduce the craving for IGD. This project will be conducted in Beijing, China, based on a large sample of internet gamers.

Inclusion Criteria:

• The scores of the 9 items of The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition(DSM-5) recommended diagnosis for Internet gaming disorder ≥ 5.
• Engagement in popular Internet games (e.g. Arena of Valor, League of Legends and Player Unknown's Battle Grounds) for over 20 hours per week for a minimum of 12 months.
• The scores of theYoung-Internet Addiction Test(Y-IAT) ≥ 50

Exclusion Criteria:

• Current or history of use of illegal substances and gambling;
• Current or history of psychiatric or neurological illness;
• Current use of psychotropic medications.