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Abstract
Bisection tasks that require individuals to identify the midpoint of a
line are often used to assess the presence of biases to spatial
attention in both healthy and patient populations. These tasks have
helped to uncover a phenomenon called pseudoneglect, a bias towards the
left-side of space in healthy individuals. First identified in the
tactile domain, pseudoneglect has been subsequently demonstrated in
other sensory modalities such as vision. Despite this, the specific
reliability of pseudoneglect within individuals across tasks and time
has been investigated very little. In this study, we investigated the
reliability of response bias within individuals across four separate
testing sessions and during three line bisection tasks: landmark, line
bisection and tactile rod bisection. Strong reliability was expected
within individuals across task and session. Pseudoneglect was found when
response bias was averaged across all tasks, for the entire sample.
However, individual data showed biases to both left and right, with some
participants showing no clear bias, demonstrating individual
differences in bias. Significant, cross-session within-individual
reliability was found for the landmark and tactile rod bisection tasks
respectively, but no significant reliability was observed for the line
bisection task. Alongside this, no significant cross-task
within-individual reliability was observed. These results highlight the
inconsistent nature of pseudoneglect within individuals, particularly
across sensory modality. They also provide strong support for the use of
the landmark task as the most reliable measure of pseudoneglect.
Original language | English |
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Article number | 107618 |
Number of pages | 10 |
Journal | Neuropsychologia |
Volume | 148 |
Early online date | 3 Sept 2020 |
DOIs | |
Publication status | Published - Nov 2020 |
Keywords
- Pseudoneglect
- Attention
- Perception
- Reliability
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