ERIC Number: EJ766100
Record Type: Journal
Publication Date: 2007-Apr
Pages: 14
Abstractor: Author
ISBN: N/A
ISSN: ISSN-0096-1523
EISSN: N/A
Contextual Modulation of the Motion Aftereffect
Falkenberg, Helle K.; Bex, Peter J.
Journal of Experimental Psychology: Human Perception and Performance, v33 n2 p257-270 Apr 2007
The authors examined center-surround effects for motion perception in human observers. The magnitude of the motion aftereffect (MAE) elicited by a drifting grating was measured with a nulling task and with a threshold elevation procedure. A surround grating of the same spatial frequency, temporal frequency, and orientation significantly reduced the magnitude of the MAE elicited by adaptation to the center grating. This effect was bandpass tuned for spatial frequency, orientation, and temporal frequency. Plaid surrounds but not contrast-modulated surrounds that moved in the same direction also reduced the MAE. These results provide psychophysical evidence for center-surround interactions analogous to those previously observed in electrophysiological studies of motion processing in primates. Collectively, these results suggest that motion processing, similar to texture processing, is organized for the purpose of highlighting regions of directional discontinuity in retinal images.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A