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Color mechanisms used in selecting stimuli for attention and making discriminations

Published online by Cambridge University Press:  05 April 2005

ALLEN L. NAGY ,
KELLY E. NERIANI  and
TRAVIS L. YOUNG
ALLEN L. NAGY
Affiliation:
Psychology Department, Wright State University, Dayton
KELLY E. NERIANI
Affiliation:
Psychology Department, Wright State University, Dayton
TRAVIS L. YOUNG
Affiliation:
Psychology Department, Wright State University, Dayton
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Abstract

Previous work (Nagy & Thomas, 2003) showed that signals in different Cardinal color mechanisms could be combined to facilitate search for a color target. Further investigation (Nagy et al., 2003) suggested that signals in one Cardinal color mechanism were used to select a subset of stimuli to be attended, while signals in second Cardinal mechanism were used to discriminate the stimuli within the selected subset. In the studies described below, we asked if observers could use color mechanisms tuned to directions other than the Cardinal directions to select and discriminate stimuli. Observers searched for a single target stimulus that differed in chromaticity from nine distractor stimuli. A two-alternative forced-choice procedure was used to estimate thresholds. Results were consistent with the hypothesis that color mechanisms tuned to many different directions in color space mediate discrimination, but suggest that only signals in Cardinal mechanisms can be used to select stimuli for attention.

Results imply that the selection of stimuli for attention on the basis of color may be mediated at the level of the lateral geniculate nucleus (LGN).

Keywords

Color mechanismsSelective attentionVisual Search
Type
Research Article
Information
Visual Neuroscience , Volume 21 , Issue 3 , May 2004 , pp. 295 - 299
Copyright
© 2004 Cambridge University Press

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References

REFERENCES

Bauer, B., Jolicoeuer, P., & Cowan, W.B. (1996). Visual search for color targets that are or are not linearly separable. Vision Research 36, 1439–1466.Google Scholar
Bauer, B., Jolicoeuer, P., & Cowan, W.B. (1999). Convex hull test of linear separability hypothesis in visual search. Vision Research 39, 2681–2696.Google Scholar
Boynton, R.M. & Kambe, N. (1980). Chromatic difference steps of moderate size measured along theoretically critical axes. Color Research and Application 5, 13–23.Google Scholar
Derrington, A.M., Krauskopf, J., & Lennie, P. (1984). Chromatic mechanisms in lateral geniculate nucleus of macaque. Journal of Physiology 357, 241–265.Google Scholar
D'Zmura, M. (1991). Color in visual search. Vision Research 31, 951–966.Google Scholar
Eskew, R.T., Jr., McLellan, J.S., & Giulianini, F. (1999). Chromatic detection and discrimination. In Color Vision: From Genes to Perception, ed. Gegenfurtner, K.R. & Sharpe, L.T., pp. 345–368. Cambridge: Cambridge University Press.
Graham, N.V.S. (1989). Visual pattern analyzers. New York: Oxford University Press.
Krauskopf, J. (1997). The paucity of evidence for Cardinal mechanisms. In John Daulton's Colour Vision Legacy, ed. Dickinson, C., Murray, I. & Carden, D., pp. 431–440. Bristol, Pennsylvania: Taylor and Francis.
Krauskopf, J. (1999). Higher order color mechanisms. In Color Vision: From Genes to Perception, ed. Gegenfurtner, K.R. & Sharpe, L.T., pp. 303–316. Cambridge: Cambridge University Press.
Krauskopf, J. & Gegenfurtner, K.R. (1992). Color discrimination and adaptation. Vision Research 32, 2165–2176.Google Scholar
Krauskopf, J., Williams, D.R., & Heeley, D.W. (1982). Cardinal directions in color space. Vision Research 22, 1123–1131.Google Scholar
Krauskopf, J., Williams, D.R., Mandler, M.B., & Brown, A.M. (1986). Higher order color mechanisms. Vision Research 26, 23–32.Google Scholar
Lennie, P. (1999). Color coding in cortex. In Color Vision: From Genes to Perception, ed. Gegenfurtner, K.R. & Sharpe, L.T., pp. 235–248. Cambridge: Cambridge University Press.
MacLeod, D.I.A. & Boynton, R.M. (1979). Chromaticity diagram showing excitation by stimuli of equal luminance. Journal of the Optical Society of America 69, 1183–1186.CrossRefGoogle Scholar
Nagy, A.L. & Thomas, G. (2003). Distractor heterogeneity, attention, and color in visual search. Vision Research 43, 1541–1552.Google Scholar
Nagy, A.L., Young, T., & Neriani, K. (2003). Combining information in different color coding mechanisms to facilitate visual search (submitted).
O'Connor, D.H., Fukui, M.M., Pinsk, M.A., & Kastner, S. (2002). Attention modulates responses in the human lateral geniculate nucleus. Nature Neuroscience 5, 1203–1209.Google Scholar
Palmer, J., Verghese, P., & Pavel, M. (2000). The psychophysics of visual search. Vision Research 40, 1227–1268.Google Scholar
Vanduffel, W., Tootel, R.B.H., & Orban, G.A. (2000). Attention-dependent suppression of metabolic activity in the early stages of the macaque visual system. Cerebral Cortex 10, 109–126.Google Scholar
Webster, M.A. & Mollon, J.D. (1991). Changes in color appearance following changes in post-receptoral adapation. Nature 349, 235–238.Google Scholar
Zaidi, Q., (2001). Is there a perceptual color space? Review of geometrical representations of perceptual phenomena. Color Research and Application 26, 325–328.CrossRefGoogle Scholar