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The Impact of Optimized Daylight and Views on the Sleep Duration and Cognitive Performance of Office Workers

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  • Mohamed Boubekri

    (School of Architecture, University of Illinois Urbana-Champaign, Champaign, IL 61820, USA)

  • Jaewook Lee

    (School of Architecture, University of Illinois Urbana-Champaign, Champaign, IL 61820, USA)

  • Piers MacNaughton

    (Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
    View Inc., Milpitas, CA 95035, USA)

  • May Woo

    (View Inc., Milpitas, CA 95035, USA)

  • Lauren Schuyler

    (View Inc., Milpitas, CA 95035, USA)

  • Brandon Tinianov

    (View Inc., Milpitas, CA 95035, USA)

  • Usha Satish

    (Psychiatry and Behavioral Sciences, SUNY Upstate Medical University, Syracuse, NY 13210, USA)

Abstract

A growing awareness has recently emerged on the health benefits of exposure to daylight and views. Daylight exposure is linked to circadian rhythm regulation, which can have significant impacts on sleep quality and cognitive function. Views of nature have also been shown to impact emotional affect and performance. This study explores the impact of optimized daylight and views on the sleep and cognitive performance of office workers. Thirty knowledge workers spent one week working in each of two office environments with identical layouts, furnishings, and orientations; however, one was outfitted with electrochromic glass and the other with traditional blinds, producing lighting conditions of 40.6 and 316 equivalent melanopic lux, respectively. Participants in the optimized daylight and views condition slept 37 min longer as measured by wrist-worn actigraphs and scored 42% higher on cognitive simulations designed to test their higher order decision-making performance. Both sleep and cognitive function were impacted after one day in the space, yet the impacts became more significant over the course of the week. The positive effect of optimized daylight and views on cognitive function was comparable for almost all participants, while increases in sleep duration were significantly greater for those with the lowest baseline sleep duration. This study stresses the significance of designing with daylight in order to optimize the sleep quality and performance of office workers.

Suggested Citation

  • Mohamed Boubekri & Jaewook Lee & Piers MacNaughton & May Woo & Lauren Schuyler & Brandon Tinianov & Usha Satish, 2020. "The Impact of Optimized Daylight and Views on the Sleep Duration and Cognitive Performance of Office Workers," IJERPH, MDPI, vol. 17(9), pages 1-16, May.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:9:p:3219-:d:354376
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    References listed on IDEAS

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    1. Robert D. Nebes & Daniel J. Buysse & Edythe M. Halligan & Patricia R. Houck & Timothy H. Monk, 2009. "Self-Reported Sleep Quality Predicts Poor Cognitive Performance in Healthy Older Adults," The Journals of Gerontology: Series B, The Gerontological Society of America, vol. 64(2), pages 180-187.
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    Cited by:

    1. Claudia R. C. Moreno & Rose Raad & Waléria D. P. Gusmão & Cristina S. Luz & Victor M. Silva & Renilda M. Prestes & Susy P. Saraiva & Lucia C. Lemos & Suleima P. Vasconcelos & Patrícia X. S. A. Nehme &, 2022. "Are We Ready to Implement Circadian Hygiene Interventions and Programs?," IJERPH, MDPI, vol. 19(24), pages 1-11, December.
    2. Ghaeili Ardabili, N. & Wang, J. & Wang, N., 2023. "A systematic literature review: Building window's influence on indoor circadian health," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).
    3. Krarti, Moncef, 2023. "Optimal energy performance of dynamic sliding and insulated shades for residential buildings," Energy, Elsevier, vol. 263(PB).

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