Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Figure ground segregation modulates perceived direction of ambiguous moving gratings and plaids
Autore:
Tommasi, L; Vallortigara, G;
Indirizzi:
Univale,ne, Dipartimento Sci Filosof & Storicosociali, Lab Psicol Speriment Univ Udine Udine Italy I-33100 of & Storicosociali, Lab Psicol Speriment Univ Padua, Dipartimento Psicol Gen, I-35131 Padua, Italy Univ Padua Padua Italy I-35131 rtimento Psicol Gen, I-35131 Padua, Italy
Titolo Testata:
VISION RESEARCH
fascicolo: 4, volume: 39, anno: 1999,
pagine: 777 - 787
SICI:
0042-6989(199902)39:4<777:FGSMPD>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOTION PERCEPTION; VISUAL-MOTION; APERTURE PROBLEM; COHERENT MOTION; TRANSPARENCY; MECHANISMS; OCCLUSION; REPRESENTATION; COLOR;
Keywords:
central occluding area; ambiguous motion direction; one-dimensional gratings; coherent motion; aperture problem;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Vallortigara, G Univale,ne, Dipartimento Sci Filosof & Storicosociali, LabPsicol Speriment Univ Udine Via Antonini 8 Udine Italy I-33100 l Speriment
Citazione:
L. Tommasi e G. Vallortigara, "Figure ground segregation modulates perceived direction of ambiguous moving gratings and plaids", VISION RES, 39(4), 1999, pp. 777-787

Abstract

A translating oriented grating viewed through a circular aperture with an occluding area in the middle appeared to move alternately in an oblique or in a vertical direction depending on the foreground/background assignment on the central occluding area. The effect occurred even when the central area was simply removed from the display, thus giving rise to a 'subjective' occluder. Parametric studies revealed that the probability of seeing obliqueor vertical motion was affected by the size of the central area but not byits contrast relationships with the grating. Similar phenomena of ambiguous motion direction were observed using changes in colour along a translating grating that produced neon colour spreading effects, or using oriented edge discontinuities that collapsed into subjective plaids composed of two one-dimensional gratings. These results are discussed with respect to the hypothesis that surface segmentation mechanisms play a crucial part in the interpretation of motion signals. (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 28/11/20 alle ore 04:48:14