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The evidence behind the series
Browse the scientific research and professional literature used across all seven volumes of The Science of Learning for Educators.
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1 reference
Odgers and Jensen review evidence about digital technology and adolescent mental health, contrasting widespread fears with what population studies can support. Average associations between time spent using digital technologies and depression, anxiety, or well-being are generally small, inconsistent, and often based on cross-sectional self-report data that cannot establish direction or causality.
Broad “screen time” measures combine activities with very different social contexts, content, and functions. Effects also vary among adolescents: online interaction may intensify existing vulnerability for some while providing information, friendship, identity exploration, or support for others. The authors call for longitudinal, experimental, within-person, and open-science research using more precise measures and attention to socioeconomic inequalities. They caution against allowing alarm to outrun evidence or ignoring genuine harms such as harassment, sleep disruption, and unequal access.
For educators and families, the review supports examining what young people do online, why, with whom, and with what consequences rather than applying one numerical exposure threshold to everyone.
A transparent research trail
Each entry identifies the volume, edition, chapter or appendix in which the work appears.
Evidence summaries explain the central idea and why the source matters to educators.
Entries link to lawful full text where available, or to a publisher, library or purchase page.
References are checked against publisher records, scholarly indexes, DOI or ISBN metadata, repositories and author records where available. An entry marked [Citation not verified] preserves the wording found in the relevant volume without attributing findings to an unconfirmed work.
From sources to a coherent pathway