Pseudoneglect for mental alphabet lines is affected by prismatic adaptation
While patients with right parietal damage and spatial neglect bisect lines to the right, the general population bisects lines to the left; a phenomenon known as pseudoneglect. The leftward bias also occurs for mental representations, such as number and alphabet lines. Prismatic adaptation can have a...
| Main Authors: | , , |
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| Format: | Journal Article |
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Springer-Verlag
2008
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| Online Access: | http://hdl.handle.net/20.500.11937/21414 |
| _version_ | 1848750583861739520 |
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| author | Nicholls, M. Kamer, A. Loftus, Andrea |
| author_facet | Nicholls, M. Kamer, A. Loftus, Andrea |
| author_sort | Nicholls, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | While patients with right parietal damage and spatial neglect bisect lines to the right, the general population bisects lines to the left; a phenomenon known as pseudoneglect. The leftward bias also occurs for mental representations, such as number and alphabet lines. Prismatic adaptation can have a dramatic eVect on attentional bias and corrects neglect and pseudoneglect for physical and mental number lines. This study examined whether prismatic adaptation can correct leftward bisection biasesfor alphabet lines, which may have a diVerent spatial arrangement compared to number lines. In pre-adaptation testing, students (n = 42) were shown letter trigrams (e.g. C H P) and judged whether the alphabetical distance before or after the inner-letter was larger. Participants were then split into three groups and were adapted to left-shifting, control or right-shifting prims. After adaptation, the mental alphabet bisection task was re-administered. The length of left side of the alphabet lines was overestimated by all three groups in the pre-adaptation phase. Right-shifting prisms and control spectacles had no eVect on the leftward bias whereas exposure to left-shifting prisms corrected the bias. The results replicate an eVect observed for mental number lines and demonstrate that low-level sensory-motor shifts can correct attentional biases associated with high-level representations, such as letters. |
| first_indexed | 2025-11-14T07:39:09Z |
| format | Journal Article |
| id | curtin-20.500.11937-21414 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:39:09Z |
| publishDate | 2008 |
| publisher | Springer-Verlag |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-214142017-09-13T13:52:23Z Pseudoneglect for mental alphabet lines is affected by prismatic adaptation Nicholls, M. Kamer, A. Loftus, Andrea Line bisection Neglect Prisms Attention While patients with right parietal damage and spatial neglect bisect lines to the right, the general population bisects lines to the left; a phenomenon known as pseudoneglect. The leftward bias also occurs for mental representations, such as number and alphabet lines. Prismatic adaptation can have a dramatic eVect on attentional bias and corrects neglect and pseudoneglect for physical and mental number lines. This study examined whether prismatic adaptation can correct leftward bisection biasesfor alphabet lines, which may have a diVerent spatial arrangement compared to number lines. In pre-adaptation testing, students (n = 42) were shown letter trigrams (e.g. C H P) and judged whether the alphabetical distance before or after the inner-letter was larger. Participants were then split into three groups and were adapted to left-shifting, control or right-shifting prims. After adaptation, the mental alphabet bisection task was re-administered. The length of left side of the alphabet lines was overestimated by all three groups in the pre-adaptation phase. Right-shifting prisms and control spectacles had no eVect on the leftward bias whereas exposure to left-shifting prisms corrected the bias. The results replicate an eVect observed for mental number lines and demonstrate that low-level sensory-motor shifts can correct attentional biases associated with high-level representations, such as letters. 2008 Journal Article http://hdl.handle.net/20.500.11937/21414 10.1007/s00221-008-1502-x Springer-Verlag restricted |
| spellingShingle | Line bisection Neglect Prisms Attention Nicholls, M. Kamer, A. Loftus, Andrea Pseudoneglect for mental alphabet lines is affected by prismatic adaptation |
| title | Pseudoneglect for mental alphabet lines is affected by prismatic adaptation |
| title_full | Pseudoneglect for mental alphabet lines is affected by prismatic adaptation |
| title_fullStr | Pseudoneglect for mental alphabet lines is affected by prismatic adaptation |
| title_full_unstemmed | Pseudoneglect for mental alphabet lines is affected by prismatic adaptation |
| title_short | Pseudoneglect for mental alphabet lines is affected by prismatic adaptation |
| title_sort | pseudoneglect for mental alphabet lines is affected by prismatic adaptation |
| topic | Line bisection Neglect Prisms Attention |
| url | http://hdl.handle.net/20.500.11937/21414 |