Perceptual latencies for chromatic versus achromatic stimuli A Ma-Wyatt1, A Kane1, M Yates2 |
|---|
1School of Psychology, University of Adelaide, Australia |
| Luminance (i.e. achromatic) information travels through the visual system faster than chromatic information. It has been demonstrated that simple reaction time is fastest to luminance stimuli and slowest to S-cone stimuli. Does luminance information generate the perceived appearance of a stimulus with less delay than chromatic information? Perceptual asynchrony was examined with a temporal order judgement (TOJ) task, a simultaneity (SJ) task and masking task (MOA). We offer an evaluation of the relative strengths of these experimental paradigms for investigating perceptual asynchrony, and discuss the potential for biases in TOJ and SJ tasks with these stimuli. Critically, the MOA task contrasts the time taken for the each of the pathways to come to threshold, making it suited for comparison to the RT task. The MOA results suggest that luminance information is available ~15 ms before S-cone information, the slowest of the chromatic pathways. |
| Up Home |
|---|