<![CDATA[Smartphone addiction is a behavioral dependency due to excessive use that can cause negative impacts, one of which is daytime sleepiness. This condition occurs when someone feels sleepy in a situation that should not cause drowsiness. Lack of sleep contributes to this problem, especially in students who sleep less than 7 hours each night, so they are at higher risk of experiencing drowsiness and difficulty focusing while studying. The Purposive was determine the relationship between smartphone addiction and daytime sleepiness in students of SMAN 1 Sukaresmi. This Methode was quantitative study with a cross-sectional design involved 94 respondents. The instruments used were the Internet Addiction Test (IAT) questionnaire to measure smartphone addiction and the Epworth Sleepiness Scale (ESS) to measure daytime sleepiness. The Results showed Bivariate analysis using the Chi-Square test showed a significance value of 0.013 (p <0.05) H0 was rejected and H1 was accepted indicating that there is a relationship between smartphone addiction and daytime sleepiness in adolescents at SMAN 1 Sukaresmi, Cianjur Regency. There is a significant relationship between smartphone addiction and daytime sleepiness in adolescents at Senior High School in Cianjur Regency]]>
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