Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
LOCAL AND GLOBAL FACTORS AFFECTING THE COHERENT MOTION OF GRATINGS PRESENTED IN MULTIPLE APERTURES
Autore:
ALAIS D; VANDERSMAGT MJ; VANDENBERG AV; VANDEGRIND WA;
Indirizzi:
VANDERBILT UNIV,VANDERBILT VIS RES CTR,WILSON HALL NASHVILLE TN 37240 UNIV UTRECHT,DEPT COMPARAT PHYSIOL,NEUROETHOL GRP NL-3584 CH UTRECHT NETHERLANDS UNIV UTRECHT,HELMHOLTZ INST NL-3584 CH UTRECHT NETHERLANDS ERASMUS UNIV,FAC MED NL-3000 DR ROTTERDAM NETHERLANDS
Titolo Testata:
Vision research (Oxford)
fascicolo: 11, volume: 38, anno: 1998,
pagine: 1581 - 1591
SICI:
0042-6989(1998)38:11<1581:LAGFAT>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
SURFACE SEGMENTATION MECHANISMS; MONKEY VISUAL-CORTEX; AREA MT; PERCEIVED SPEED; MACAQUE MONKEY; STRIATE CORTEX; MOVING LINES; PERCEPTION; DIRECTION; INTEGRATION;
Keywords:
MOTION; COHERENCE; GLOBAL; LOCAL; TERMINATORS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
56
Recensione:
Indirizzi per estratti:
Citazione:
D. Alais et al., "LOCAL AND GLOBAL FACTORS AFFECTING THE COHERENT MOTION OF GRATINGS PRESENTED IN MULTIPLE APERTURES", Vision research (Oxford), 38(11), 1998, pp. 1581-1591

Abstract

Using stimuli composed of two independent gratings viewed through multiple apertures. we investigate a number of parameters affecting the integration of locally ambiguous motions into globally coherent motion. In four experiments, we varied local factors (grating spatial frequency, speed, contrast, duty cycle, orientation) and global factors (degree of similarity and common fate between the gratings, and symmetry inthe configuration of the grating pattern) and examined their effects on global motion coherence. Our results, confirming accounts offered by previous investigators, indicate that local competition between motion signals generated by contours (ambiguous) and their line terminations (unambiguous) is important in determining global motion coherence in multiple-aperture stimuli. Our results also indicate that global factors can affect perceived coherence independently of local motion signals, suggesting the involvement of higher-level motion areas and a role for non-motion processes such as those involved in pattern and form perception. Comparing motion coherence with other two-dimensional (2-D) stimuli (plaids) shows that 2-D multiple-aperture stimuli are not analogous and that coherence models derived from plaid stimuli do not account for the data. (C) 1998 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 04:59:49