Visual Perception

191.

Dual target identification and the attentional blink in Parkinsons disease.

In healthy adults, deficits in identifying a second target following a previously attended target in Rapid Serial Visual Presentation (RSVP) occur between intertarget intervals of approximately 100-500 ms. This Attentional Blink (AB) is investigated in ...
Yvette Vardy, John L Bradshaw, Robert Iansek (J Clin Exp Neuropsychol, 200305)
dual-target-identification-attentional-blink-parkinson-s-disease.asp

192.

Different visual search strategies in stationary and moving radial patterns.

This study compared visual search strategies in patterns of radially moving dots (simulating self-motion) to those used in matched stationary displays (radial patterns of lines). To control for differences in target visibility, 75% detection thresholds ...
E M van Loon, I Th C Hooge, A V Van den Berg (Vision Res, 200305)
different-visual-search-strategies-stationary-moving-radial-patterns.asp

193.

Anatomic dissociation of selective and suppressive processes in visual attention.

Visual spatial attention is associated with activation in parietal regions as well as with modulation of visual activity in ventral occipital cortex. Within the parietal lobe, localisation of activity has been hampered by variation in individual anatomy. ...
Matthew K Belmonte, Deborah A Yurgelun-Todd (Neuroimage, 200305)
anatomic-dissociation-selective-suppressive-processes-visual-attention.asp

194.

Cortical magnification within human primary visual cortex correlates with acuity thresholds.

We measured linear cortical magnification factors in V1 with fMRI, and we measured visual acuity (Vernier and grating) in the same observers. The cortical representation of both Vernier and grating acuity thresholds in V1 was found to be roughly constant ...
Robert O Duncan, Geoffrey M Boynton (Neuron, 200305)
cortical-magnification-human-primary-visual-cortex-correlates-acuity.asp

195.

Spatiotemporal dynamics of the auditory novelty-P3 event-related brain potential.

The spatiotemporal dynamics of the cerebral network involved in novelty processing was studied by means of scalp current density (SCD) analysis of the novelty P3 (nP3) event-related brain potential (ERP). ERPs were recorded from 30 scalp electrodes at ...
Elena Yago, Carles Escera, Kimmo Alho, Marie-Hélène Giard, Josep M Serra-Grabulosa (Brain Res Cogn Brain Res, 200305)
spatiotemporal-dynamics-auditory-novelty-p-event-related-brain.asp

196.

When does the visual system use viewpoint-invariant representations during recognition?

One popular model of object recognition claims that the visual system typically describes objects using view-specific representations, but that viewpoint-invariant representations are used when objects can be specified uniquely by the arrangement of ...
Kevin D Wilson, Martha J Farah (Brain Res Cogn Brain Res, 200305)
visual-system-viewpoint-invariant-representations-recognition.asp

197.

Spatial scale contribution to early visual differences between face and object processing.

Event-related potential (ERP) studies have highlighted an occipito-temporal potential, the N170, which is larger for faces than for other categories and delayed by stimulus inversion of faces, but not of other objects. We examined how high-pass and ...
Valérie Goffaux, Isabel Gauthier, Bruno Rossion (Brain Res Cogn Brain Res, 200305)
spatial-scale-contribution-early-visual-differences-face-object.asp

198.

Cross-modal perceptual integration of spatially and temporally disparate auditory and visual stimuli.

Under certain conditions, auditory and visual information are integrated into a single unified percept even when they originate in different locations in space. The present study shows how this illusion, known as the ventriloquism effect, depends on ...
Jörg Lewald, Rainer Guski (Brain Res Cogn Brain Res, 200305)
cross-modal-perceptual-integration-spatially-temporally-disparate.asp

199.

Can holistic processing be learned for inverted faces?

The origin of "special" processing for upright faces has been a matter of ongoing debate. If it is due to generic expertise, as opposed to having some innate component, holistic processing should be learnable for stimuli other than upright faces. Here we ...
Rachel Robbins, Elinor McKone (Cognition, 200305)
holistic-processing-learned-inverted-faces.asp

200.

Attention maintains mental extrapolation of target position: irrelevant distractors eliminate forward displacement after implied motion.

Observers judgments of the final position of a moving target are typically shifted in the direction of implied motion ("representational momentum"). The role of attention is unclear: visual attention may be necessary to maintain or halt target ...
Dirk Kerzel (Cognition, 200305)
attention-maintains-mental-extrapolation-target-position-irrelevant.asp