Projects per year
Abstract
An expert panel prepared the initial 48 item pool. Responses to these items were then collected in an online survey producing responses from an international sample (690 completed responses, 74 countries, 28 time zones). Exploratory factor analysis on an initial subset of our sample (n=428) rendered a five-factor solution with 25 items (Wearing blue light filters, spending time outdoors, using phone and smart-watch in bed, using light before bedtime, using light in the morning and during daytime). Confirmatory factor analysis on another subset of participants (n=262) yielded the best fit for the five-factor solution after discarding another two items (CFI=0.97, TLI=0.96, RMSEA=0.05, SRMR=0.09). The internal consistency reliability coefficient for the total instrument was McDonald’s omega_t=0.73. Measurement model invariance analysis between native and non-native English speakers showed our model attained the highest level of invariance (residual invariance; CFI=0.95, TLI =0.95, RMSEA=0.05). Lastly, a short form of LEBA (n=18) was developed using Item Response Theory on the complete sample (n=690).
The psychometric properties of the LEBA instrument indicate the usability to measure the light exposure-related behaviours across a variety of settings and may offer a scalable solution to characterise light exposure-related behaviours in remote samples. The LEBA instrument will be available under the open-access CC-BY-NC-ND license.
Original language | English |
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Title of host publication | CIE Australia Lighting Research Conference 2022 |
Subtitle of host publication | Conference Programme |
Publisher | CIE |
Pages | 24-24 |
Number of pages | 1 |
Publication status | Published - 8 Feb 2022 |
Event | CIE Australia Lighting Research Conference 2022 - Online, Sydney, Australia Duration: 8 Feb 2022 → 8 Feb 2022 http://www.cie.org.au/calreco2022.html |
Conference
Conference | CIE Australia Lighting Research Conference 2022 |
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Country/Territory | Australia |
City | Sydney |
Period | 8/02/22 → 8/02/22 |
Other | Originally the conference was planned to be at the University of New South Wales in Sydney, but was changed to online only due to uncertainty surrounding the omicron COVID-19 variant and rising cases in NSW. |
Internet address |
Keywords
- light exposure
- light-related behaviour
- non-visual effects of light
- psychometrics
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Bioclock
de Kort, Y. A. W. (Project Manager), Schlangen, L. J. M. (Project member), Visser, E. (Project member) & Molnar, N. (Project member)
1/06/21 → 31/05/27
Project: Second tier
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LightCap: Light, Cognition, Attention, Perception (LightCap)
de Kort, Y. A. W. (Project Manager), Schlangen, L. J. M. (Project member), Gecer, E. (Project member), Verhoef, V. T. R. (Project member), Jedon, R. (Project member), van den Berge, B. (Project member), Smolders, K. C. H. J. (Project member), Gkaintatzi Masouti, M. (Project member), Aarts, M. P. J. (CoPI), van Duijnhoven, J. (Project member) & Haans, A. (CoPI)
1/03/20 → 31/12/24
Project: Third tier