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Cited by 122Sleep and related disordersCircadian rhythm and melatoninSleep and Work-Related Fatigue

The DOI matches its Crossref record; 78 of the 79 references it cites were found in a registry or an index.

Does one hour of bright or short-wavelength filtered tablet screenlight have a meaningful effect on adolescents’ pre-bedtime alertness, sleep, and daytime functioning?

Heath, Melanie, Sutherland, Cate, Bartel, Kate, Gradisar, Michael, Williamson, Paul, Lovato, Nicole, Micic, Gorica·2014·Chronobiology International
DOI 10.3109/07420528.2013.872121
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Abstract

Electronic media use is prevalent among adolescent populations, as is the frequency of sleeplessness. One mechanism proposed for technology affecting adolescents' sleep is the alerting effects from bright screens. Two explanations are provided. First, screens emit significant amounts of short-wavelength light (i.e. blue), which produces acute alertness and alters sleep timing. Second, later chronotypes are hypothesised to be hypersensitive to evening light. This study analysed the pre-sleep alertness (GO/NOGO task speed, accuracy; subjective sleepiness), sleep (sleep diary, polysomnography), and morning functioning of 16 healthy adolescents (M = 17.4 ± 1.9 yrs, 56% f) who used a bright tablet screen (80 lux), dim screen (1 lux) and a filtered short-wavelength screen (f.lux; 50 lux) for 1 hr before their usual bedtime in a within-subjects protocol. Chronotype was analysed as a continuous between-subjects factor; however, no significant interactions occurred. Significant effects occurred between bright and dim screens for GO/NOGO speed and accuracy. However, the magnitude of these differences was small (e.g. GO/NOGO speed = 23 ms, accuracy = 13%), suggesting minimal clinical significance. No significant effects were found for sleep onset latency, slow-rolling eye movements, or the number of SWS and REM minutes in the first two sleep cycles. Future independent studies are needed to test short (1 hr) vs longer (>2 hrs) screen usage to provide evidence for safe-to-harmful levels of screenlight exposure before adolescents' usual bedtime.

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Crossref · 10.3109/07420528.2013.872121

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Citations

Cites

Research works printed but not linked: 11

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  2. Cajochen C, 1992, Sleep, 15, 337
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  11. Waggoner TL, 2005, PseudoIsochromatic plate Ishihara compatible (PIPIC): Colour vision test: 24 plate edition

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Metadata

Authors
Heath, M., Sutherland, C., Bartel, K., Gradisar, M., Williamson, P., Lovato, N., & Micic, G.
Affiliations
Flinders University (AU)
Corresponding author
Gradisar, Michael
ORCID
Venue
Chronobiology International
Publisher
Informa UK Limited
Published
2014-01-07
Volume
31
Issue
4
Pages
496-505
ISSN
  • 0742-0528 (ISSN-L)
  • 1525-6073
DOI
10.3109/07420528.2013.872121
OpenAlex
W2161789805
Cited by
122
References
79
Citations by year
2026: 4 · 2025: 7 · 2024: 9 · 2023: 8 · 2022: 18 · 2021: 9 · 2020: 5 · 2019: 14 · 2018: 10 · 2017: 12 · 2016: 13 · 2015: 5 · 2014: 8
FWCI
17.59
Type
journal article
Language
en
Open access
closed
Locations
  • Chronobiology International (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
blue light, short-wavelength light, adolescents, sleep latency, chronotype, sleep quality, daytime functioning, go/no-go task, sleepiness, screen time before bedtime
MeSH terms
Activities of Daily Living, Activity Cycles, Adolescent, Adolescent Behavior, Age Factors, Cognition, Humans, Light, Male, Surveys and Questionnaires, Sleep Stages, Time Factors, Wakefulness, Polysomnography, Photoperiod, Computers, Handheld, Young Adult

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