Devi Irene M Rumapea et al. 2022. The Effect of Online Game Addiction and Learning Concentration on Social Science Students’ Learning Outcomes in Eight Grage of Private Junior High School Kartika 1-4 Pematang Siantar. International Journal of Humanities and Education Development (IJHED). 4, 5 (Oct. 2022), 91–94. DOI:https://doi.org/10.22161/jhed.4.5.13.