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Titolo:
THE EFFECT OF TRANSIENCY ON PERCEIVED VELOCITY OF VISUAL-PATTERNS - ACASE OF TEMPORAL CAPTURE
Autore:
TREUE S; SNOWDEN RJ; ANDERSEN RA;
Indirizzi:
UNIV WALES COLL CARDIFF,SCH PSYCHOL CARDIFF CF1 3YG WALES MIT,DEPT BRAIN & COGNIT SCI,E25-236 CAMBRIDGE MA 02139
Titolo Testata:
Vision research
fascicolo: 5-6, volume: 33, anno: 1993,
pagine: 791 - 798
SICI:
0042-6989(1993)33:5-6<791:TEOTOP>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
APPARENT MOTION; CONTRAST; DISCRIMINATION; GRATINGS; PERCEPTION; FREQUENCY; MOVEMENT; NEURONS; CORTEX; SYSTEM;
Keywords:
VISUAL MOTION; TEMPORAL FREQUENCY CHANNELS; VELOCITY; RANDOM-DOT PATTERNS; LIMITED LIFETIME;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
S. Treue et al., "THE EFFECT OF TRANSIENCY ON PERCEIVED VELOCITY OF VISUAL-PATTERNS - ACASE OF TEMPORAL CAPTURE", Vision research, 33(5-6), 1993, pp. 791-798

Abstract

We measured the points of subjective equality of velocity for dynamicunidirectionally moving random-dot patterns with different amounts oftransiency. The transiency was changed by varying the time a dot would move before being randomly replotted within the stimulus. The perceived velocity of patterns moving at intermediate velocities (4 or 6 deg/sec) was increased by decreasing the point lifetime while no speedup was observed at high velocities (12 deg/sec). A speedup was also observed when a few stationary points of short lifetime were introduced into a stimulus. The non-directional transiency generated by these flickering points seems to be captured by the moving pattern and biases the velocity estimate. We term this phenomenon ''temporal capture''. The results are in agreement with models that determine velocity by comparing the activity in lower and higher temporal frequency channels. Our stimuli would selectively increase activity in high temporal frequency channels and thus lead to an increase in perceived velocity.

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Documento generato il 27/10/20 alle ore 05:34:12