The Relationship betweenGender, Smartphone Addiction, and Sleep Quality amongHigh School Students at Adventist Schools in Jakarta

Smartphone addiction is one of the crucial problems that is happening among teenagers. This habit may lead to various problems such as lower sleep quality. Hence, this study aimed to investigate the relationship between smartphone addiction and sleep quality. This study applied quantitative analysis to investigate the correlation between gender, smartphone addiction, and sleep quality among 270 students in levels 10-12 from 8 Adventist High Schools in Jakarta. The study used simple random sampling technique. The study used the Pittsburgh Sleep Quality Index (PSQI) and the Smartphone Addiction Scale (SAS). Both descriptive and inferential analyses were performed usingthe SPSS statistical program. The hypotheses of the study were tested using Pearson correlation. The study found a correlation between high school students' sleep quality and smartphone addiction, as well as a higher rate of smartphone addiction among female students than male students. The study found that students' rates of smartphone addiction decreased with improved sleep quality. Addressing smartphone addiction and inadequate sleep is essential for raising high school students's academic achievement.