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Titolo:
OPPONENT MOTION INTERACTIONS IN THE PERCEPTION OF TRANSPARENT MOTION
Autore:
LINDSEY DT; TODD JT;
Indirizzi:
OHIO STATE UNIV,OVALWOOD HALL MANSFIELD OH 44906 OHIO STATE UNIV COLUMBUS OH 43210
Titolo Testata:
Perception & psychophysics
fascicolo: 4, volume: 60, anno: 1998,
pagine: 558 - 574
SICI:
0031-5117(1998)60:4<558:OMIITP>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
SURFACE SEGMENTATION MECHANISMS; MOVING VISUAL-PATTERNS; SPATIAL WHITE NOISE; RANDOM-DOT PATTERNS; COHERENT MOTION; OPTIC FLOW; MOVEMENT; MODEL; DIRECTIONS; VELOCITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Citazioni:
63
Recensione:
Indirizzi per estratti:
Citazione:
D.T. Lindsey e J.T. Todd, "OPPONENT MOTION INTERACTIONS IN THE PERCEPTION OF TRANSPARENT MOTION", Perception & psychophysics, 60(4), 1998, pp. 558-574

Abstract

Interactions in the perception of motion transparency were investigated using a signal-detection paradigm. The stimuli were the linear sum of two independent, moving, random-check ''signal'' textures and a third texture consisting of dynamic random ''noise. '' Performance was measured as the ratio of squared signal and noise contrasts was varied (S-2/N-2). Motion detectability was poorest when the two signal texturesmoved in opposite directions (180 degrees), intermediate when they moved in the same direction (0 degrees), and best when the textures moved in directions separated by 90 degrees in the stimulus plane. This pattern of results held across substantial variations in velocity, fieldsize, duration, and texture-element size. Motion identification was also impaired, relative to 0 degrees, in the 180 degrees but not in the90 degrees condition. These results are consistent with the idea thatperformance in the opponent-motion condition is limited by inhibitory(or suppressive) interactions. These interactions, however, appear tobe direction specific: little, if any, inhibition was observed for perpendicular motion.

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Documento generato il 18/09/20 alle ore 19:40:55