Discomfort glare evaluation: the influence of anchor bias in luminance adjustments
Luminance adjustment is a procedure commonly used to evaluate discomfort glare and the results from adjustment experiments form the basis of some recommendations for limiting its occurrence. There are, however, strong reasons to expect that settings made using adjustment are unintentionally influenc...
| Main Authors: | , , |
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| Format: | Article |
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SAGE Publications
2017
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| Online Access: | https://eprints.nottingham.ac.uk/47839/ |
| _version_ | 1848797642825400320 |
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| author | Kent, M.G. Fotios, S. Altomonte, Sergio |
| author_facet | Kent, M.G. Fotios, S. Altomonte, Sergio |
| author_sort | Kent, M.G. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Luminance adjustment is a procedure commonly used to evaluate discomfort glare and the results from adjustment experiments form the basis of some recommendations for limiting its occurrence. There are, however, strong reasons to expect that settings made using adjustment are unintentionally influenced by extraneous variables. This paper discusses bias towards the initial anchor, the setting of the variable stimulus immediately before an adjustment is made. Specifically, the initial luminance is expected to influence the setting that is made by adjustment; for example, a lower initial luminance leads to a lower setting than a high initial luminance. To investigate anchor bias, a Hopkinson-like multiple-criterion adjustment experiment was undertaken, but with three different anchors. The results confirmed significant bias: glare settings were biased towards the luminance of the initial anchor. This demonstrates a need for caution when using adjustment to explore discomfort glare and when interpreting the results of past studies that used discomfort glare models fitted to data obtained with this procedure. |
| first_indexed | 2025-11-14T20:07:08Z |
| format | Article |
| id | nottingham-47839 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:07:08Z |
| publishDate | 2017 |
| publisher | SAGE Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-478392020-05-04T19:12:21Z https://eprints.nottingham.ac.uk/47839/ Discomfort glare evaluation: the influence of anchor bias in luminance adjustments Kent, M.G. Fotios, S. Altomonte, Sergio Luminance adjustment is a procedure commonly used to evaluate discomfort glare and the results from adjustment experiments form the basis of some recommendations for limiting its occurrence. There are, however, strong reasons to expect that settings made using adjustment are unintentionally influenced by extraneous variables. This paper discusses bias towards the initial anchor, the setting of the variable stimulus immediately before an adjustment is made. Specifically, the initial luminance is expected to influence the setting that is made by adjustment; for example, a lower initial luminance leads to a lower setting than a high initial luminance. To investigate anchor bias, a Hopkinson-like multiple-criterion adjustment experiment was undertaken, but with three different anchors. The results confirmed significant bias: glare settings were biased towards the luminance of the initial anchor. This demonstrates a need for caution when using adjustment to explore discomfort glare and when interpreting the results of past studies that used discomfort glare models fitted to data obtained with this procedure. SAGE Publications 2017-10-13 Article PeerReviewed Kent, M.G., Fotios, S. and Altomonte, Sergio (2017) Discomfort glare evaluation: the influence of anchor bias in luminance adjustments. Lighting Research and Technology . ISSN 1477-0938 https://doi.org/10.1177/1477153517734280 doi:10.1177/1477153517734280 doi:10.1177/1477153517734280 |
| spellingShingle | Kent, M.G. Fotios, S. Altomonte, Sergio Discomfort glare evaluation: the influence of anchor bias in luminance adjustments |
| title | Discomfort glare evaluation: the influence of anchor bias in luminance adjustments |
| title_full | Discomfort glare evaluation: the influence of anchor bias in luminance adjustments |
| title_fullStr | Discomfort glare evaluation: the influence of anchor bias in luminance adjustments |
| title_full_unstemmed | Discomfort glare evaluation: the influence of anchor bias in luminance adjustments |
| title_short | Discomfort glare evaluation: the influence of anchor bias in luminance adjustments |
| title_sort | discomfort glare evaluation: the influence of anchor bias in luminance adjustments |
| url | https://eprints.nottingham.ac.uk/47839/ https://eprints.nottingham.ac.uk/47839/ https://eprints.nottingham.ac.uk/47839/ |