Abstract
Morrone et al. [Morrone, M. C., Denti, V., & Spinelli, D. (2002). Color and luminance contrasts attract independent attention. Current Biology, 12, 1134-1137] reported that the detrimental effect on contrast discrimination thresholds of performing a concomitant task is modality specific: performing a secondary luminance task has no effect on colour contrast thresholds, and vice versa. Here we confirm this result with a novel task involving learning of spatial position, and go on to show that it is not specific to the cardinal colour axes: secondary tasks with red-green stimuli impede performance on a blue-yellow task and vice versa. We further show that the attentional effect can be abolished with continued training over 2-4 training days (2-20 training sessions), and that the effect of learning is transferable to new target positions. Given the finding of transference, we discuss the possibility that V4 is a site of plasticity for both stimulus types, and that the separation is due to a luminance-colour separation within this cortical area.
Original language | English |
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Pages (from-to) | 60-70 |
Number of pages | 11 |
Journal | Vision Research |
Volume | 47 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2007 |
Keywords
- Attention
- Colour
- Contrast discrimination
- Perceptual learning
- Plasticity
- Pop-out
- V4
- Ventral stream
- Visual search
ASJC Scopus subject areas
- Ophthalmology
- Sensory Systems