Abstract：
:We used a virtual reality setup to let participants grasp discs, which differed in luminance, chromaticity and size. Current theories on perception and action propose a division of labor in the brain into a color proficient perception pathway and a less color-capable action pathway. In this study, we addressed the question whether isoluminant stimuli, which provide only a chromatic but no luminance contrast for action planning, are harder to grasp than stimuli providing luminance contrast or both kinds of contrast. Although we found that grasps of isoluminant stimuli had a slightly steeper slope relating the maximum grip aperture to disc size, all other measures of grip quality were unaffected. Overall, our results do not support the view that isoluminance of stimulus and background impedes the planning of a grasping movement.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Kleinholdermann U,Franz VH,Gegenfurtner KR,Stockmeier Kdoi
10.1007/s00221-009-1841-2subject
Has Abstractpub_date
2009-07-01 00:00:00pages
15-22issue
1eissn
0014-4819issn
1432-1106journal_volume
197pub_type
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