The combination of motion signals over time
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Cited by (91)
Spatial proximity modulates the strength of motion opponent suppression elicited by locally paired dot displays
2018, Vision ResearchCitation Excerpt :These differences may have affected the strength of the opponency elicited by Silva and Liu’s (2015) counter-phase displays. For example, two-frame stroboscopic apparent motion is believed to drive MT cells relatively poorly (Mikami, Newsome, & Wurtz, 1986), and behavioral data supports the idea that stroboscopic motion stimuli are better integrated over multiple successive frames (Snowden & Braddick, 1989). If two-frame motion is an unreliable probe of MT activity, the suppression elicited by opponency may be difficult to detect using Silva and Liu’s (2015) two-frame stimuli.
Information extraction during simultaneous motion processing
2014, Vision ResearchCitation Excerpt :Using a modified global-motion stimulus (Newsome & Pare, 1988), Edwards and Greenwood (2005) demonstrated that the maximum number of transparent motion signals defined only by differences in direction which could be simultaneously processed was two. They proposed that this limit of two was due to the elevated signal intensity threshold, defined as the proportion of motion signals within a given area moving at one velocity, relative to all others (Edwards & Nishida, 1999; Snowden & Braddick, 1989). Whereas the threshold for detecting unidirectional motion is around 10–15%, transparent motion requires over 40% for each signal.
The effect of spatial orientation on detecting motion trajectories in noise
2011, Vision ResearchCitation Excerpt :The lack of speed and FD effects suggests that the motion mechanisms underlying iso- and ortho-motion discrimination are different. Snowden and Braddick (1989) found evidence of two networks of motion-selective units, one relatively independent of delay in the range of 50–100 ms and the other responding well at shorter delays (20 ms). We propose that ortho-motion discrimination is mediated by a combination of the response of a ET network and a local mechanism extracting the OMC component.
Vision in developmental disorders: Is there a dorsal stream deficit?
2010, Brain Research BulletinLow- and high-level first-order random-dot kinematograms: Evidence from fMRI
2009, Vision ResearchMotion streaks improve motion detection
2007, Vision Research
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Present address: Department of Brain and Cognitive Sciences, E25-236, Massachusetts Institute of Technology, MA 02139, U.S.A.