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Titolo:
DETECTION AND DISCRIMINATION OF OPTICAL-FLOW COMPONENTS
Autore:
BLAKE R; AIBA TS;
Indirizzi:
VANDERBILT UNIV,DEPT PSYCHOL NASHVILLE TN 37240 UNIV AIR,DEPT PSYCHOL,MIHAMA KU CHIBA 261 JAPAN HOKKAIDO UNIV,DEPT BEHAV SCI SAPPORO HOKKAIDO 060 JAPAN
Titolo Testata:
Japanese psychological research
fascicolo: 1, volume: 40, anno: 1998,
pagine: 19 - 30
SICI:
0021-5368(1998)40:1<19:DADOOC>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
MST NEURONS; MOTION; DIRECTION; SENSITIVITY; STIMULI; EFFICIENCY; PERCEPTION; PATTERNS; FIELD; CELLS;
Keywords:
MOTION; COHERENT MOTION; VISUAL DETECTION; VISUAL DISCRIMINATION; OPTIC FLOW;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
R. Blake e T.S. Aiba, "DETECTION AND DISCRIMINATION OF OPTICAL-FLOW COMPONENTS", Japanese psychological research, 40(1), 1998, pp. 19-30

Abstract

Observers viewed animation sequences consisting of random dots, some of which moved coherently in a given direction (signal dots) and the rest of which moved randomly (noise dots). Using forced-choice procedures, detectability of weak signals within noise was measured for translation, rotation, and expansion/contraction. Sensitivity to all motion types was approximately equal, with practiced observers reliably detecting coherent motion at signal levels as low as 4%. Observers were able to identify the motion structure presented on a given trial at signal levels corresponding to the detection threshold, implying that the neural signals supporting detection are labeled for motion type. Results are discussed in the context of hierarchical analysis of optic flow in which all motion types are registered as patterns of activity amongneurons comprising a single mechanism.

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Documento generato il 28/11/20 alle ore 04:21:43