Bisection tasks are commonly used to assess biases and asymmetries in visuospatial attention both patients neurologically intact individuals. In these tasks, participants usually asked identify the midpoint manually bisect a horizontal line. Typically, healthy individuals tend show an processing advantage for left visual field, known as “pseudoneglect.” Here, performance at two computerized ver...

Thirteen patients with left neglect performed line bisection under four conditions: no cue, visual cueing involving the report of a digit placed at the left end of the line, circling the left-end digit, and digit circling plus tracing of the line with the right index finger from its left end to its midpoint before bisection. Digit circling plus finger tracing was unequivocally more effective in...

One patient with left spatial neglect (FM) and four right-brain damaged controls without neglect were tested on a line bisection task with pictures of neutral and emotional faces of the same size as unilateral cues. Our aim was to investigate whether bisection biases induced by cuing can be better explained as the result of a direct perceptual lengthening of the cued part of the line or, altern...

In perceptual learning, performance often improves within a short time if only one stimulus variant is presented, such as a line bisection stimulus with one outer-line-distance. However, performance stagnates if two bisection stimuli with two outer-line-distances are presented randomly interleaved. Recently, S. G. Kuai, J. Y. Zhang, S. A. Klein, D. M. Levi, and C. Yu, (2005) proposed that learn...

We investigated the conditions that underlie the vertical and bisection illusion in touch, in order to understand the basis of their similarity to visual illusions, and the means of reducing the biases in length perception by active touch. Movement, speed, and spatial reference cues were tested. Movements in scanning L-shapes in ipsilateral and contralateral (across the body midline) table-top ...

BACKGROUND AND PURPOSE Patients with chronic visual field defects typically show a contralesional line bisection error (LBE). However, in the acute phase of the disease, it has been suggested that the LBE points to the ipsilesional side. The aims of the current study were first, to test whether specific lesions are associated with LBE, and second, to determine whether there is a difference in t...

A total of 12 patients with hemispatial neglect (and two control groups) were tested to examine the effects of lateralized cues on line bisection and Landmark judgements. The experiment was designed to investigate whether bisection and landmark biases induced by cueing are simply a result of a direct perceptual lengthening of the cued part of the line caused by the fact that the cue is visible,...

CONTEXT In previous studies, patients with migraine and tension-type headaches have shown asymmetries at the central nervous system level. AIMS Hence we would like to figure out whether the lateral cerebral dominance might be more pronounced in the line bisection performance with these patients. SETTINGS AND DESIGN Patients were enrolled in a specialized headache clinic and healthy voluntee...