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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 15, Iss. 12 — Dec. 1, 1998
  • pp: 2945–2950

Failure of direction discrimination at detection threshold for both fast and slow chromatic motion

Andrew B. Metha and Kathy T. Mullen  »View Author Affiliations

JOSA A, Vol. 15, Issue 12, pp. 2945-2950 (1998)

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Separate pathways have recently been proposed for “fast” and “slow” motion, whose properties differ in the way that color contrast is processed [see Nature (London) 367, 268 (1994); Trends Neurosci. 19, 394 (1996); and Vision Res. 36, 1281 (1996) and Vision Res. 35, 1547 (1995)]. One reported difference is that for slow motion the direction of chromatic stimuli cannot be determined at detection threshold, whereas at higher temporal rates detection and direction discrimination threshold coincide. Using a carefully designed psychophysical procedure, we measured simultaneously the thresholds for detection, direction discrimination, and color identification for isoluminant red–green and achromatic Gabor patches (1.5 cpd), over the range of visible temporal frequencies (1–16 Hz). We find that the color of both the red–green and the achromatic targets can be identified at detection threshold, indicating effective isolation of the luminance and the red–green mechanisms at all stimulus speeds. For the achromatic mechanism, direction discrimination was always possible at detection threshold. For the red–green mechanism, we find that direction discrimination thresholds are significantly greater than detection thresholds at all stimulus speeds. This result calls into question models of chromatic motion processing that are dichotomized along the lines of stimulus speed.

© 1998 Optical Society of America

OCIS Codes
(330.1720) Vision, color, and visual optics : Color vision
(330.1800) Vision, color, and visual optics : Vision - contrast sensitivity
(330.4150) Vision, color, and visual optics : Motion detection
(330.5510) Vision, color, and visual optics : Psychophysics

Original Manuscript: April 20, 1998
Revised Manuscript: June 30, 1998
Manuscript Accepted: August 25, 1998
Published: December 1, 1998

Andrew B. Metha and Kathy T. Mullen, "Failure of direction discrimination at detection threshold for both fast and slow chromatic motion," J. Opt. Soc. Am. A 15, 2945-2950 (1998)

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  1. M. J. Hawken, K. R. Gegenfurtner, C. Tang, “Contrast dependence of colour and luminance motion mechanisms in human vision,” Nature (London) 367, 268–270 (1994). [CrossRef]
  2. K. R. Gegenfurtner, M. J. Hawken, “Interaction of motion and color in the visual pathways,” Trends Neurosci. 19, 394–401 (1996). [CrossRef] [PubMed]
  3. K. R. Gegenfurtner, M. J. Hawken, “Perceived velocity of luminance, chromatic and non-Fourier stimuli: Influence of contrast and temporal frequency,” Vision Res. 36, 1281–1290 (1996). [CrossRef] [PubMed]
  4. K. R. Gegenfurtner, M. J. Hawken, “Temporal and chromatic properties of motion mechanisms,” Vision Res. 35, 1547–1563 (1995). [CrossRef] [PubMed]
  5. C. F. Stromeyer, R. T. Eskew, R. E. Kronauer, “The most sensitive motion detectors in humans are spectrally opponent,” Invest. Ophthalmol. Visual Sci. 31, S240 (1990).
  6. D. T. Lindsey, D. Y. Teller, “Motion at isolumince: discrimination/detection ratios for moving isoluminant gratings,” Vision Res. 30, 1751–1761 (1990). [CrossRef]
  7. P. Cavanagh, S. Anstis, “The contribution of color to motion in normal and color-deficient observers,” Vision Res. 31, 2109–2148 (1991). [CrossRef] [PubMed]
  8. A. Fiorentini, D. Burr, C. Morrone, “Temporal characteristics of colour vision: VEP and psychophysical measurements,” in From Pigments to Perception, A. Valberg, B. Lee, eds. (Plenum, New York, 1991), pp. 139–149.
  9. K. T. Mullen, J. C. Boulton, “Absence of smooth motion perception in color vision,” Vision Res. 32, 483–488 (1992). [CrossRef] [PubMed]
  10. J. Palmer, L. A. Mobley, D. Y. Teller, “Motion at isoluminance: discrimination/detection ratios and the summation of luminance and chromatic signals,” J. Opt. Soc. Am. A 10, 1353–1362 (1993). [CrossRef] [PubMed]
  11. D. Y. Teller, D. T. Lindsey, “Motion at isoluminance: motion dead zones in three-dimensional color space,” J. Opt. Soc. Am. A 10, 1324–1331 (1993). [CrossRef] [PubMed]
  12. A. B. Metha, A. J. Vingrys, D. R. Badcock, “Detection and discrimination of moving stimuli: the effects of color, luminance, and eccentricity,” J. Opt. Soc. Am. A 11, 1697–1709 (1994). [CrossRef]
  13. C. F. Stromeyer, R. E. Kronauer, A. Ryu, A. Chapparo, R. T. Eskew, “Contributions of human long-wave and middle-wave cones to motion detection,” J. Physiol. (London) 485, 221–243 (1995).
  14. A. Metha, “Detection and direction discrimination in terms of post-receptoral mechanisms,” Ph.D. thesis (The University of Melbourne, Melbourne, Australia, 1994).
  15. A. M. Derrington, G. B. Henning, “Detecting and discriminating the direction of motion of luminance and colour gratings,” Vision Res. 33, 799–811 (1993). [CrossRef] [PubMed]
  16. D. Regan, C. W. Tyler, “Some dynamic features of colour vision,” Vision Res. 11, 1307–1324 (1971). [CrossRef] [PubMed]
  17. P. Cavanagh, D. I. A. MacLeod, S. M. Anstis, “Equiluminance: spatial and temporal factors and the contribution of blue-sensitive cones,” J. Opt. Soc. Am. A 4, 1428–1438 (1987). [CrossRef] [PubMed]
  18. C. F. Stromeyer, A. Chapparo, A. S. Tolias, R. E. Kronauer, “Colour adaptation modifies the long-wave versus middle-wave cone weights and temporal phases in human luminance (but not red–green) mechanism,” J. Physiol. (London) 499, 227–254 (1997).
  19. A. B. Metha, K. T. Mullen, “Temporal mechanisms underlying flicker detection and identification for red–green and achromatic stimuli,” J. Opt. Soc. Am. A 13, 1969–1980 (1996). [CrossRef]
  20. N. Graham, Visual Pattern Analyzers (Oxford U. Press, New York, 1989).
  21. S. J. Cropper, A. M. Derrington, “Rapid colour-specific detection of motion in human vision,” Nature (London) 379, 72–74 (1996). [CrossRef]
  22. A. B. Metha, K. T. Mullen, “Red–green and achromatic temporal filters: a ratio model predicts contrast-dependent speed perception,” J. Opt. Soc. Am. A 14, 984–996 (1997). [CrossRef]

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