Fars, J and Fernandes, T.P. and Huchzermeyer, C and Kremers, J and Paramei, Galina V. (2022) Chromatic discrimination measures in mature observers depend on the response window. Scientific Reports, 12. ISSN 2045-2322
Preview |
Text
Fars_et_al-2022-Scientific_Reports.pdf - Published Version Available under License Creative Commons Attribution. Download (4MB) | Preview |
Abstract
Our past anecdotal evidence prompted that a longer response window (RW) in the Trivector test (Cambridge Colour Test) improved mature observers’ estimates of chromatic discrimination. Here, we systematically explored whether RW variation affects chromatic discrimination thresholds measured by the length of Protan, Deutan and Tritan vectors. We employed the Trivector test with three RWs: 3 s, 5 s, and 8 s. Data of 30 healthy normal trichromats were stratified as age groups: ‘young’ (20–29 years), ‘middle-aged’ (31–48 years), and ‘mature’ (57–64 years). We found that for the ‘young’ and ‘middle-aged’, the thresholds were comparable at all tested RWs. However, the RW effect was apparent for the ‘mature’ observers: their Protan and Tritan thresholds decreased at 8-s RW compared to 3-s RW; moreover, their Tritan threshold decreased at 5-s RW compared to 3-s RW. Elevated discrimination thresholds at shorter RWs imply that for accurate performance, older observers require longer stimulus exposure and are indicative of ageing effects manifested by an increase in critical processing duration. Acknowledging low numbers in our ‘middle-aged’ and ‘mature’ samples, we consider our study as pilot. Nonetheless, our findings encourage us to advocate a RW extension in the Trivector protocol for testing mature observers, to ensure veridical measures of their chromatic discrimination by disentangling these from other ageing effects—slowing down of both motor responses and visual processing.
| Item Type: | Article |
|---|---|
| Additional Information and Comments: | The final publication is available at https://www.nature.com/articles/s41598-022-13129-w Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. o view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
| Faculty / Department: | Faculty of Human and Digital Sciences > School of Psychology |
| Depositing User: | Matthew Adams |
| Date Deposited: | 07 Jun 2022 12:34 |
| Last Modified: | 07 Jun 2022 12:34 |
| URI: | https://hira.hope.ac.uk/id/eprint/3549 |
Actions (login required)
 |
View Item |
Altmetric
Altmetric
