The neglected page.
Normal subjects bisect vertical lines above the true midpoint. We posited that the portion of the page farthest from the line or the page's geometric center, though not the focus of attention, would still engage attention. Therefore, subjects should make bisection errors in the direction of the distant portion or geometric center. We expected the greatest superior bisection errors to be made when lines were placed at the bottom of the page and the smallest errors to be made when the lines were placed at the top of the page. Ten young, normal subjects bisected vertical lines placed in 1 of 3 positions on a page (top, center, bottom) with the page located in 1 of 3 spatial locations (superior, middle, inferior). The results of our study were consistent with our predictions. Thus, although the page on which a line is bisected is often ignored, it is not neglected.
Shuren
J
J
Department of Neurology, University of Florida College of Medicine.
Wertman
E
E
Heilman
K M
KM
D000328:Adult; D001288:Attention; D004215:Distance Perception; D005260:Female; D005364:Field Dependence-Independence; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D009949:Orientation; D011597:Psychomotor Performance; D012016:Reference Values; D012858:Size Perception; D013028:Space Perception