Virtual Reality is a technology supporting new forms of Human-Computer Inte
raction. Direct manipulation of virtual objects may engage the user in a "v
isuo-centered" context where perceptual information creates multiple afford
ances, and physical laws can be modified. The research reported here tests
the hypothesis that this new type of context would affect the cognitive pro
cesses of an immersed subject. Problem-solving situations have been arrange
d to trap subjects with salient but irrelevant perceptual information. The
first experiment showed that immersed subjects fail to find a correct respo
nse to an elementary problem usually proposed for children, in which a visu
al trap is involved. The second experiment supported this result for elemen
tary trapping problems presented in the auditory modality. These findings s
how a dependency of reasoning as a function of the context in which it occu
rs.