Reduced influence of perceptual context in mild traumatic brain injury is not an illusion
Abstract Perceptual grouping is impaired following mild traumatic brain injury (mTBI). This may affect visual size perception, a process influenced by perceptual grouping abilities. We conducted two experiments to evaluate visual size perception in people with self-reported history of mTBI, using tw...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-03-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-56713-y |
| _version_ | 1797247280311435264 |
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| author | A. Sidhu L. Uiga B. Langley R. S. W. Masters |
| author_facet | A. Sidhu L. Uiga B. Langley R. S. W. Masters |
| author_sort | A. Sidhu |
| collection | DOAJ |
| description | Abstract Perceptual grouping is impaired following mild traumatic brain injury (mTBI). This may affect visual size perception, a process influenced by perceptual grouping abilities. We conducted two experiments to evaluate visual size perception in people with self-reported history of mTBI, using two different size-contrast illusions: the Ebbinghaus Illusion (Experiment 1) and the Müller-Lyer illusion (Experiment 2). In Experiment 1, individuals with mTBI and healthy controls were asked to compare the size of two target circles that were either the same size or different sizes. The target circles appeared by themselves (no-context condition), or were surrounded by smaller or larger circles (context condition). Similar levels of accuracy were evident between the groups in the no-context condition. However, size judgements by mTBI participants were more accurate in the context condition, suggesting that they processed the target circles separately from the surrounding circles. In Experiment 2, individuals with mTBI and healthy controls judged the length of parallel lines that appeared with arrowheads (context condition) or without arrowheads (no context condition). Consistent with Experiment 1, size judgements by mTBI participants were more accurate than size judgements by control participants in the context condition. These findings suggest that mTBI influences size perception by impairing perceptual grouping of visual stimuli in near proximity. |
| first_indexed | 2024-04-24T19:56:11Z |
| format | Article |
| id | doaj.art-9fce9eb5b35d49a78628a67eaf960b5b |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-24T19:56:11Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-9fce9eb5b35d49a78628a67eaf960b5b2024-03-24T12:20:53ZengNature PortfolioScientific Reports2045-23222024-03-0114111010.1038/s41598-024-56713-yReduced influence of perceptual context in mild traumatic brain injury is not an illusionA. Sidhu0L. Uiga1B. Langley2R. S. W. Masters3Te Huataki Waiora School of Health, University of WaikatoDepartment of Sport and Exercise Sciences, Manchester Metropolitan UniversityTe Huataki Waiora School of Health, University of WaikatoTe Huataki Waiora School of Health, University of WaikatoAbstract Perceptual grouping is impaired following mild traumatic brain injury (mTBI). This may affect visual size perception, a process influenced by perceptual grouping abilities. We conducted two experiments to evaluate visual size perception in people with self-reported history of mTBI, using two different size-contrast illusions: the Ebbinghaus Illusion (Experiment 1) and the Müller-Lyer illusion (Experiment 2). In Experiment 1, individuals with mTBI and healthy controls were asked to compare the size of two target circles that were either the same size or different sizes. The target circles appeared by themselves (no-context condition), or were surrounded by smaller or larger circles (context condition). Similar levels of accuracy were evident between the groups in the no-context condition. However, size judgements by mTBI participants were more accurate in the context condition, suggesting that they processed the target circles separately from the surrounding circles. In Experiment 2, individuals with mTBI and healthy controls judged the length of parallel lines that appeared with arrowheads (context condition) or without arrowheads (no context condition). Consistent with Experiment 1, size judgements by mTBI participants were more accurate than size judgements by control participants in the context condition. These findings suggest that mTBI influences size perception by impairing perceptual grouping of visual stimuli in near proximity.https://doi.org/10.1038/s41598-024-56713-y |
| spellingShingle | A. Sidhu L. Uiga B. Langley R. S. W. Masters Reduced influence of perceptual context in mild traumatic brain injury is not an illusion Scientific Reports |
| title | Reduced influence of perceptual context in mild traumatic brain injury is not an illusion |
| title_full | Reduced influence of perceptual context in mild traumatic brain injury is not an illusion |
| title_fullStr | Reduced influence of perceptual context in mild traumatic brain injury is not an illusion |
| title_full_unstemmed | Reduced influence of perceptual context in mild traumatic brain injury is not an illusion |
| title_short | Reduced influence of perceptual context in mild traumatic brain injury is not an illusion |
| title_sort | reduced influence of perceptual context in mild traumatic brain injury is not an illusion |
| url | https://doi.org/10.1038/s41598-024-56713-y |
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