ReviewFrontiers in psychology2021
Effects of Daytime Electric Light Exposure on Human Alertness and Higher Cognitive Functions: A Systematic Review.
Review in Frontiers in psychology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
21 citing papers in PubMed, 55 citations in OpenAlex.
- Reducing Test Anxiety: A Randomized Controlled Pilot Study of Evening Bright Light Exposure in University Students.Depression and anxiety · 2025Trial
- Impact of repeated morning bright white light exposures on attention in a simulated office environment.Scientific reports · 2023Trial
- Analysis of real-world eye level light exposure through spectacle lens.Npj biological timing and sleep · 2026Article
- Cortical excitability is affected by light exposure - Distinct effects in adolescents and young adults.Neurobiology of sleep and circadian rhythms · 2026Article
- Goal-directed human factor experiment on the non-visual effect of luminous environment on indoor exercise.Scientific reports · 2026Article
- Cone-Specific Filter-Based Neuromodulation: A Proposed Clinical Framework for Amblyopia, Strabismus, and ADHD.Clinics and practice · 2025Article
- Relationships between light exposure and aspects of cognitive function in everyday life.Communications psychology · 2025Article
- The Impact of Lighting Conditions on Users' Alertness and Working Memory in Confined Spaces.PsyCh journal · 2025Article
- Afternoon to early evening bright light exposure reduces later melatonin production in adolescents.Npj biological timing and sleep · 2025Article
- Advancing Neuroscience and Therapy: Insights into Genetic and Non-Genetic Neuromodulation Approaches.Cells · 2025Review
- Multimodal in-vehicle lighting system increases daytime light exposure and alertness in truck drivers under Arctic winter conditions.Scientific reports · 2024Article
- The cognitive impact of light: illuminating ipRGC circuit mechanisms.Nature reviews. Neuroscience · 2024Review
- Primer on Reproducible Research in R: Enhancing Transparency and Scientific Rigor.Clocks & sleep · 2023Review
- An inventory of human light exposure behaviour.Scientific reports · 2023Article
- Associations between light exposure and sleep timing and sleepiness while awake in a sample of UK adults in everyday life.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Light exposure behaviors predict mood, memory and sleep quality.Scientific reports · 2023Article
- Affective Impressions Recognition under Different Colored Lights Based on Physiological Signals and Subjective Evaluation Method.Sensors (Basel, Switzerland) · 2023Article
- Fiat Lux: Light and Pedagogy for the 21st Century.Annals of neurosciences · 2023Article
- Light as a Modulator of Non-Image-Forming Brain Functions-Positive and Negative Impacts of Increasing Light Availability.Clocks & sleep · 2023Review
- Effects of Ambient Illuminance on Explicit and Implicit Altruism: The Mediation Roles of Perceived Anonymity and Satisfaction with Light.International journal of environmental research and public health · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
This paper reports the results of a systematic review conducted on articles examining the effects of daytime electric light exposure on alertness and higher cognitive functions. For this, we selected 59 quantitative research articles from 11 online databases. The review protocol was registered with PROSPERO (CRD42020157603). The results showed that both short-wavelength dominant light exposure and higher intensity white light exposure induced alertness. However, those influences depended on factors like the participants' homeostatic sleep drive and the time of day the participants received the light exposure. The relationship between light exposure and higher cognitive functions was not as straightforward as the alerting effect. The optimal light property for higher cognitive functions was reported dependent on other factors, such as task complexity and properties of control light. Among the studies with short-wavelength dominant light exposure, ten studies (morning: 3; afternoon: 7) reported beneficial effects on simple task performances (reaction time), and four studies (morning: 3; afternoon: 1) on complex task performances. Four studies with higher intensity white light exposure (morning: 3; afternoon: 1) reported beneficial effects on simple task performance and nine studies (morning: 5; afternoon: 4) on complex task performance. Short-wavelength dominant light exposure with higher light intensity induced a beneficial effect on alertness and simple task performances. However, those effects did not hold for complex task performances. The results indicate the need for further studies to understand the influence of short-wavelength dominant light exposure with higher illuminance on alertness and higher cognitive functions.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.