Frequency of Internet use negatively predicts longitudinal change in gray and white matter volumes and in verbal IQ in early adolescents¶
Claim · All claims
Evidence · 1 study (2 entries) · reviewr3·q3
Currency · newest study 2021 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q3 i? Longitudinal VBM analyses showed frequency of Internet use negatively predicted change (smaller volume increase) in regional gray and white matter volumes of a widespread anatomical cluster. → Marciano Laura 2021
q3 i? Frequency of Internet use significantly and negatively correlated with change in verbal IQ. → Marciano Laura 2021 (2)
Evidence¶
Marciano Laura 2021¶
Marciano Laura, Camerini Anne-Linda, Morese Rosalba. (2021). The Developing Brain in the Digital Era: A Scoping Review of Structural and Functional Correlates of Screen Time in Adolescence. Frontiers in Psychology. https://doi.org/10.3389/fpsyg.2021.671817
q3 · i? · review · r3
Longitudinal VBM study of 284 early adolescents aged 11 years with follow-up around age 14; cross-sectional analyses found no correlations between regional gray and white matter volumes and Internet use frequency. No effect size printed.
"longitudinal analyses with data collected from study participants aged around 14 years, and corrected for confounding variables (including age), revealed that the frequency of Internet use negatively predicted change (i.e., smaller volume increase) in regional gray and white matter volumes of a widespread anatomical cluster"
Marciano Laura 2021 (2)¶
Marciano Laura, Camerini Anne-Linda, Morese Rosalba. (2021). The Developing Brain in the Digital Era: A Scoping Review of Structural and Functional Correlates of Screen Time in Adolescence. Frontiers in Psychology. https://doi.org/10.3389/fpsyg.2021.671817
q3 · i? · review · r3
Same longitudinal study: the review reports the negative correlation with verbal IQ change measured by the Wechsler IQ test, which the authors link to smaller development in the affected regions. No effect size printed.
"In addition, the frequency of Internet use significantly and negatively correlated with the change in verbal IQ."
Discussion¶
Related Claims¶
- Adolescents with Internet addiction show structural and resting-state functional brain alterations, including reduced gray matter density, reduced white matter FA, and decreased connectivity in DMN and CEN
- Frequent and longer screen-based media use, including Internet-related addictive behaviors, is related to a less efficient cognitive control system in adolescence
- Screen time is not significantly associated with white matter microstructure (FA, MD) in 10-year-olds, while sports participation is positively associated with FA — related
- Excessive smartphone use in adolescents is associated with reduced frontostriatal connectivity and greater cortisol-related withdrawal symptoms — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
internet-use-frequency-longitudinal-gray-matter-verbal-iq |
title |
Frequency of Internet use negatively predicts longitudinal change in gray and white matter volumes and in verbal IQ in early adolescents |
description |
Frequency of Internet use negatively predicts longitudinal change in gray and white matter volumes and in verbal IQ in early adolescents |
status |
review |
evidence_strength |
weak |
newest_evidence |
2021 |
generated |
by process:wiki-ingest on 2026-10-16 |
trust |
unverified — no one has confirmed this page's content |
sources |
2 — marciano-laura-2021, marciano-laura-2021-2 |
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