PERCEPTUAL AND RESPONSE BIAS IN UNILATERAL NEGLECT - 2 MODIFIED VERSIONS OF THE MILNER LANDMARK TASK

Perceptual and response bias in estimating the proportion of the two s egments of prebisected lines were disambiguated in a group of 121 pati ents suffering from left neglect by means of two variants of the Milne r Landmark task (Milner el al., 1993). The first variant, LANDMARK-V, required a verbal response; the second variant, LANDMARK-M, required m anual pointing. The paper reports and discusses the results obtained o n each task and their correlations, as well as the relationships betwe en either kind of bias and the intrahemispheric location of the lesion . It is argued that besides their usefulness as a diagnostic tool the proposed variants of the Milner Landmark task provide results that are worth further investigation in their own right. (C) 1998 Academic Pre ss.