This paper reports normative data relative to a shortened form of two versions of the Milner Landmark task, involving verbal and manual responses, 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 clinicoanatomical correlations, and (c) in planning selective remediation programs. The results of the investigation establish criteria for classifying a patient's bias as normal, borderline, or pathological.