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Is there inhibition of return for isoluminant colors?


Canto-Pereira,  LH
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Canto-Pereira, L., Paramei GG, Ranvaud, R., & Müller, H. (2006). Is there inhibition of return for isoluminant colors? In XXIIth Annual Meeting of the International Society for Psychophysics (Fechner Day 2006) (pp. 169-174). Hatfield, UK: University of Hertfordshire Press.

In the present study we replicate experiments of Lupiañez et al. (1997) who addressed theissue of inhibition of return with respect to the color of stimuli. In contrast to that study, usingnon-isoluminant stimuli, we employed two pairs of isoluminant colors varying along either the red-green or blue-yellow cardinal axes of a color space – deutan or tritan confusion linesin the CIE 1976. Participants (normal trichromats; n=8) were exposed successively to thecolor pairs; their task was to respond to the second (target) stimulus by key pressing, wherebysimple reaction times were measured. In different trial stimulus onset asynchrony (SOA) wasvaried: 100, 400, 700, 1000 and 1300 ms. At no SOA inhibition of return was found; instead, facilitation of return was demonstrated, this especially pronounced at the short SOA=100 ms.We found that participants were overall faster in the invalid condition when compared to thevalid condition (F=25.986, p=0.001). We hypothesized that when isoluminants colors areemployed as both cue and target, Inhibition of Return can’t be establish.