Form Perception

51.

A laminar cortical model of stereopsis and three-dimensional surface perception.

A laminar cortical model of stereopsis and later stages of 3D surface perception is developed and simulated. The model describes how initial stages of monocular and binocular oriented filtering interact with later stages of 3D boundary formation and ...
Stephen Grossberg, Piers D L Howe (Vision Res, 200303)
laminar-cortical-model-stereopsis-three-dimensional-surface-perception.asp

52.

Attentional selection of overlapped shapes: a study using brief shape aftereffects.

Prior studies using brief stimulus sequences revealed "opponent shape aftereffects", indicative of direct opponent coding of global shape attributes such as aspect ratio, skew, taper, curvature, and convexity (perhaps in IT). Further, aftereffects from ...
Satoru Suzuki (Vision Res, 200303)
attentional-selection-overlapped-shapes-study-brief-shape-aftereffects.asp

53.

Local and global contributions to shape discrimination.

Humans are remarkably sensitive in detecting small deviations from circularity. In tasks involving discrimination between closed contours, either circular in shape or defined by sinusoidal modulations of the circle radius, human performance has been ...
Gunter Loffler, Hugh R Wilson, Frances Wilkinson (Vision Res, 200303)
local-global-contributions-shape-discrimination.asp

54.

Separating objects and neural computation.

This article demonstrates how that the effectiveness of nervous system in doing the computations essential to an organism can be based on using algorithms that are readily implemented by nervous system device biophysics. Collective effects and collective ...
John J Hopfield, Carlos D Brody (C R Biol, 200302)
separating-objects-neural-computation.asp

55.

The effects of orientation on detection and identification of facial expressions of emotion.

Signal detection procedures were used to examine the ability of participants to detect and label facial expressions of emotion in an upright or inverted orientation when the faces were rapid videotaped presentations. The detection and identification of ...
Glenda C Prkachin (Br J Psychol, 200302)
effects-orientation-detection-identification-facial-expressions.asp

56.

Object-based representations facilitate memory for inhibitory processes.

Previous work has shown that in a sequential cueing task, inhibition of the return of attention (IOR) can be observed for up to four or five loci. We have argued that the inhibition processes mediating IOR are associated with object-based ...
Matthew A Paul, Steven P Tipper (Exp Brain Res, 200302)
object-based-representations-facilitate-memory-inhibitory-processes.asp

57.

Integration process of contours defined by different attributes.

We examined how contours defined by different attributes are integrated into a shape using the visual search paradigm and found that the search for the bar orientation is particularly difficult when each bar is composed of motion-defined and luminance- ...
Hiromi Morita, Masahiko Morita, Takatsune Kumada (Brain Res Cogn Brain Res, 200302)
integration-process-contours-defined-different-attributes.asp

58.

The influence of irrelevant stimulus changes on stimulus and response repetition effects.

In this study the influence of irrelevant stimulus changes from one trial to another in a serial reaction time task was investigated. Two experiments were performed in which subjects were required to respond to stimulus colour. Four colours were mapped ...
Wim Notebaert, Eric Soetens (Acta Psychol (Amst), 200302)
influence-irrelevant-stimulus-changes-stimulus-response-repetition.asp

59.

Spatiotemporal activation of the two visual pathways in form discrimination and spatial location: a brain mapping study.

To address the question of the relationship between the two visual pathways, a ventral stream for object and form vision and a dorsal stream for spatial and motion vision, we measured the spatiotemporal activation patterns in the two pathways responding ...
Hengyi Rao, Tiangang Zhou, Yan Zhuo, Silu Fan, Lin Chen (Hum Brain Mapp, 200302)
spatiotemporal-activation-two-visual-pathways-form-discrimination.asp

60.

The processing of kinetic contours in the brain.

This work investigates whether the brain assigns special cortical areas for the processing of kinetic contours. In human imaging experiments, we compared the brain activity produced in the so-called kinetic occipital area (KO) when humans perceive shapes ...
S Zeki, R J Perry, A Bartels (Cereb Cortex, 200302)
processing-kinetic-contours-brain.asp