Verbal-response and manual-response versions of the Milner Landmark task: normative data.

The paper reports normative data relative to a shortened form of two versions of the Milner Landmark task, involving verbal and manual response, respectively, which have been found to provide crucial information to discriminate perceptual from response bias in unilateral neglect. Normative data based on a large group of subjects were believed to be necessary because the Landmark task is held to be worth further investigation: (a) in comparison with other tasks devised for similar purposes, (b) in elucidating clinico-anatomical correlations, and (c) in planning selective remediation programmes. The results of the investigation provide criteria on the basis of which a patient's bias can be classified as being normal, borderline, or pathological.