Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

Weight and see : line bisection in neglect reliably measures the allocation of attention, but not the perception of length.

McIntosh, Robert D. and Ietswaart, Magdalena and Milner, A. David (2017) 'Weight and see : line bisection in neglect reliably measures the allocation of attention, but not the perception of length.', Neuropsychologia., 106 . pp. 146-158.

Abstract

Line bisection has long been a routine test for unilateral neglect, along with a range of tests requiring cancellation, copying or drawing. However, several studies have reported that line bisection, as classically administered, correlates relatively poorly with the other tests of neglect, to the extent that some authors have questioned its status as a valid test of neglect. In this article, we re-examine this issue, employing a novel method for administering and analysing line bisection proposed by McIntosh et al. (2005). We report that the measure of attentional bias yielded by this new method (EWB) correlates significantly more highly with cancellation, copying and drawing measures than the classical line bisection error measure in a sample of 50 right-brain damaged patients. Furthermore when EWB was combined with a second measure that emerges from the new analysis (EWS), even higher correlations were obtained. A Principal Components Analysis found that EWB loaded highly on a major factor representing neglect asymmetry, while EWS loaded on a second factor which we propose may measure overall attentional investment. Finally, we found that tests of horizontal length and size perception were related poorly to other measures of neglect in our group. We conclude that this novel approach to interpreting line bisection behaviour provides a promising way forward for understanding the nature of neglect.

Item Type:Article
Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution Non-commercial No Derivatives.
Download PDF
(733Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1016/j.neuropsychologia.2017.09.014
Publisher statement:This article is available under a Creative Commons license Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Date accepted:13 September 2017
Date deposited:23 October 2017
Date of first online publication:18 September 2017
Date first made open access:No date available

Save or Share this output

Export:
Export
Look up in GoogleScholar