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Urvashi Mehta
Independent Researcher
India
Abstract
Continuous screen exposure has become endemic in modern educational and occupational contexts, prompting concerns about its cognitive and developmental implications. This manuscript investigates the impact of prolonged digital device use on cognitive flexibility—the capacity to adapt one’s thinking and behavior in response to changing goals and environmental stimuli. Through a comprehensive mixed‑methods approach combining systematic literature synthesis, a large‑scale survey (n = 500) of adolescents and young adults, and a controlled two‑week experimental intervention, we examine how screen time duration, content type, and multitasking behaviors relate to measures of cognitive set‑shifting, inhibitory control, and working memory updating. In addition to standard behavioral tasks (WCST, task‑switching paradigm, N‑back), participants completed self‑report indices of perceived adaptability and underwent daily usage logging to ensure ecological validity.
Our results reveal a nonlinear relationship: moderate, purposeful screen use (e.g., interactive educational apps and structured cognitive training games) correlates with preserved—or even enhanced—cognitive flexibility, evidenced by faster switch‑trial reaction times (ΔRT = –8%) and reduced perseverative errors (–12%) on the WCST. By contrast, excessive, passive consumption (e.g., video streaming, social media scrolling) and high‑frequency media multitasking predict significant decrements in flexibility performance (p < .01), including slower task‑switching speeds and diminished working memory updating accuracy. Importantly, these effects persisted after controlling for baseline executive function, socioeconomic status, and sleep quality, suggesting a direct influence of screen engagement patterns on cognitive outcomes.
The study highlights the critical role of content quality and user engagement style in moderating digital media’s cognitive effects. Our findings offer actionable recommendations for educators, parents, and policymakers: limit unstructured passive media use, integrate cognitively challenging digital activities into curricula, and develop guidelines for balanced screen habits. By delineating the conditions under which screen exposure supports versus undermines adaptive thinking, this research contributes to evidence‑based strategies that harness technology’s benefits while safeguarding cognitive health in an increasingly digital world.
Keywords
Continuous screen exposure; cognitive flexibility; digital multitasking; educational technology; set‐shifting
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