Abstract

If a pattern requiring orientation discrimination was presented randomly in one of five clearly demarcated time frames 500 ms apart, orientation thresholds were elevated ~20% over their values when the time slot was fixed. For stereoscopic depth discrimination the disparity threshold elevation was ~ 40%.

© 1996 Optical Society of America

Uncertainty experiments support the roles of second-order mechanisms in spatial frequency and orientation discriminations

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Discrimination of the spatial derivatives of horizontal binocular disparity

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