Study Links Over 3 Hours of Daily Screen Time to Declines in Adolescent Attention and Memory

A recent study reveals that increased screen time correlates with decreased cognitive performance in adolescents. Researchers observed a statistically significant decline in attention span and memory recall among teenagers who spend more than three hours daily on electronic devices. Furthermore, the study indicates a potential link between excessive screen use and heightened symptoms of anxiety and depression in the same age group. The research, conducted over a two-year period, involved a cohort of 500 adolescents aged 13-17. Participants self-reported their daily screen time, encompassing activities such as social media, gaming, and video streaming. Cognitive performance was assessed through standardized tests evaluating attention, memory, and executive functions. Mental health was gauged using established questionnaires designed to identify symptoms of anxiety and depression. The findings show that adolescents exceeding the three-hour threshold on screens performed demonstrably worse on cognitive tests compared to those with limited screen exposure. They also reported experiencing higher levels of anxiety and depressive symptoms. The researchers emphasized that these findings highlight a correlation and do not establish a causal relationship. Further investigation is needed to fully understand the underlying mechanisms and long-term effects of screen time on adolescent development.

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Date: April 29, 2025

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Author

Mark Chiang

紐約 NYU Computer Science 碩士 紐澤西 UMDNJ Biomedical Informatics 博士 中研院博士後 台灣大學博士後