Rationale, To investigate whether using smartphones before bed negatively impacts the sleep quality of teenagers., Literature Review, Previous studies show mixed findings on the impact of pre-bedtime smartphone use on sleep quality. Some suggest a link due to blue light exposure and cognitive stimulation (Smith et al., 2017), while others argue for individual differences and social interactions as mediating factors (Johnson et al., 2019; Brown and Lee, 2020)., Methodology, Conduct a survey of 300 teenagers, asking about their smartphone usage before bedtime and their sleep quality, then analyze the data statistically., Result, The study reveals that teenagers who frequently use smartphones before bed experience significantly poorer sleep quality., Implication, The study's reliance on self-reported data may limit accuracy. Future research should incorporate objective sleep measures. Recommendations include reducing smartphone use before bedtime to enhance sleep quality among teenagers..

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