Form Perception

151.

Disruption of neural systems of visual attention in schizophrenia.

BACKGROUND: Patients with schizophrenia show attention deficits. The frontal P2a and posterior N2b event-related potential components are early indices of activity in neural systems supporting attention and they are reduced in schizophrenia in auditory ...
Geoffrey F Potts, Brian F ODonnell, Yoshio Hirayasu, Robert W McCarley (Arch Gen Psychiatry, 200205)
disruption-neural-systems-visual-attention-schizophrenia.asp

152.

Expertise training with novel objects leads to left-lateralized facelike electrophysiological responses.

Scalp event-related potentials (ERPs) in humans indicate that face and object processing differ approximately 170 ms following stimulus presentation, at the point of the N170 occipitotemporal component. The N170 is delayed and enhanced to inverted faces ...
B Rossion, I Gauthier, V Goffaux, M J Tarr, M Crommelinck (Psychol Sci, 200205)
expertise-training-novel-objects-leads-left-lateralized-facelike.asp

153.

Directional performance in motion transparency.

Motion transparency provides a challenging test case for our understanding of how visual motion, and other attributes, are computed and represented in the brain. However, previous studies of visual transparency have used subjective criteria which do not ...
Oliver J Braddick, Keith A Wishart, William Curran (Vision Res, 200205)
directional-performance-motion-transparency.asp

154.

Binocular integration of partially occluded surfaces.

Normal binocular vision can provide a view of an object partially occluded so that no part of it is seen by both eyes but all of it is seen by one or other eye. We used two-dimensional filtered noise textures to explore the conditions under which the ...
Jason Forte, Jonathan W Peirce, Peter Lennie (Vision Res, 200205)
binocular-integration-partially-occluded-surfaces.asp

155.

Short-term temporal recruitment in structure from motion.

Temporal integration was investigated in the minimal conditions necessary to perform a structure-from-motion (SFM) task. Observers were asked to discriminate three-dimensional (3D) surface orientations in conditions in which the stimulus displays ...
Corrado Caudek, Fulvio Domini, Massimiliano Di Luca (Vision Res, 200205)
short-term-temporal-recruitment-structure-motion.asp

156.

Perceptual learning of luminance contrast detection: specific for spatial frequency and retinal location but not orientation.

Performance of a wide range of simple visual tasks improves with practice. Here we ask whether such learning occurs for the fundamental visual task of luminance contrast detection. In two experiments we find that contrast sensitivity increases following ...
Paul T Sowden, David Rose, Ian R L Davies (Vision Res, 200205)
perceptual-learning-luminance-contrast-detection-specific-spatial.asp

157.

Evidence for a cascade model of lexical access in speech production.

How word production unfolds remains controversial. Serial models posit that phonological encoding begins only after lexical node selection, whereas cascade models hold that it can occur before selection. Both models were evaluated by testing whether ...
Ezequiel Morsella, Michele Miozzo (J Exp Psychol Learn Mem Cogn, 200205)
evidence-cascade-model-lexical-access-speech-production.asp

158.

Induced gamma activity is associated with conscious awareness of pattern masked nouns.

The aim of this study was to explore the relationship between electroencephalographic (EEG) activity in the gamma frequency range and conscious awareness of a visual stimulus. EEG was recorded from subjects while they were shown backward-masked words ...
Christopher Summerfield, Anthony Ian Jack, Adrian Philip Burgess (Int J Psychophysiol, 200205)
induced-gamma-activity-associated-conscious-awareness-pattern-masked.asp

159.

Fast long-distance interactions in the early processing of motion-defined form and of combinations of motion-defined, luminance-defined, and cyclopean form.

Humans can compare the orientations and locations of two motion-defined test bars several degrees apart so as to rapidly encode and place in memory their mean orientation, orientation difference, separation and mean location, while ignoring stimuli ...
Radha P Kohly, D Regan (Vision Res, 200204)
fast-long-distance-interactions-early-processing-motion-defined-form.asp

160.

Looking at images with human figures: comparison between autistic and normal children.

Based on clinical observations of abnormal gaze behavior of autistic children, it has been suggested that autistic children have a problem in processing social information. Several studies on eye movements have indeed found indications that children with ...
J N van der Geest, C Kemner, G Camfferman, M N Verbaten, H van Engeland (J Autism Dev Disord, 200204)
looking-images-human-figures-comparison-autistic-normal-children.asp