THE VISUALLY PERCEIVED VELOCITY AS A FUNCTION OF APERTURE SIZE, STRIPE SIZE, LUMINANCE, AND MOTION DIRECTION

TADASU OYAMA

doi:10.4992/psycholres1954.12.163

TADASU OYAMA

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JOURNAL FREE ACCESS

1970 Volume 12 Issue 4 Pages 163-171

DOI https://doi.org/10.4992/psycholres1954.12.163

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Published: 1970 Received: January 08, 1971 Available on J-STAGE: February 24, 2009 Accepted: - Advance online publication: - Revised: -
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Date of correction: February 24, 2009 Reason for correction: - Correction: ABSTRACT Details: Wrong : The velocity perception was studied with linearly moving stripes shown through rectangular apertures. Velocity matches were made by 4 to 9 Ss for two reference velocities, 30'/sec and 5°/sec. The perceived velocity decreased as either aperture size or stripe size increased. Brown's transposition principle did not hold completely when the aperture and stripe size increased propor-tionally. The results can be understood as simultaneous manifestations of the aperture and stripe effects. The effect of the luminance upon the perceived velocity was not clear, though the fusion threshold linearly increased as the log. luminance increased. The velocity was underestimated in horizontal motions as compared with vertical motions under high velocity.
Right : The velocity perception was studied with linearly moving stripes shown through rectangular apertures. Velocity matches were made by 4 to 9 Ss for two reference velocities, 30′/sec and 5°/sec. The perceived velocity decreased as either aperture size or stripe size increased. Brown's transposition principle did not hold completely when the aperture and stripe size increased proportionally. The results can be understood as simultaneous manifestations of the aperture and stripe effects. The effect of the luminance upon the perceived velocity was not clear, though the fusion threshold linearly increased as the log. luminance increased. The velocity was underestimated in horizontal motions as compared with vertical motions under high velocity.

Date of correction: February 24, 2009 Reason for correction: - Correction: PDF FILE Details: -

Date of correction: February 24, 2009 Reason for correction: - Correction: ABSTRACT Details: Wrong : The velocity perception was studied with linearly moving stripes shown through rectangular apertures. Velocity matches were made by 4 to 9 Ss for two reference velocities, 30′/sec and 5°/sec. The perceived velocity decreased as either aperture size or stripe size increased. Brown's transposition principle did not hold completely when the aperture and stripe size increased proportionally. The results can be understood as simultaneous manifestations of the aperture and stripe effects. The effect of the luminance upon the perceived velocity was not clear, though the fusion threshold linearly increased as the log. luminance increased. The velocity was underestimated in horizontal motions as compared with vertical motions under high velocity.
Right : The velocity perception was studied with linearly moving stripes shown through rectangular apertures. Velocity matches were made by 4 to 9 Ss for two reference velocities, 30′/sec and 5°/sec. The perceived velocity decreased as either aperture size or stripe size increased. Brown's transposition principle did not hold completely when the aperture and stripe size increased proportionally. The results can be understood as simultaneous manifestations of the aperture and stripe effects. The effect of the luminance upon the perceived velocity was not clear, though the fusion threshold linearly increased as the log. luminance increased. The velocity was underestimated in horizontal motions as compared with vertical motions under high velocity.

Abstract

The velocity perception was studied with linearly moving stripes shown through rectangular apertures. Velocity matches were made by 4 to 9 Ss for two reference velocities, 30′/sec and 5°/sec. The perceived velocity decreased as either aperture size or stripe size increased. Brown's transposition principle did not hold completely when the aperture and stripe size increased proportionally. The results can be understood as simultaneous manifestations of the aperture and stripe effects. The effect of the luminance upon the perceived velocity was not clear, though the fusion threshold linearly increased as the log. luminance increased. The velocity was underestimated in horizontal motions as compared with vertical motions under high velocity.

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