Effect of visuomotor calibration and uncertainty on the perception of peripersonal space.
Summary of "Effect of visuomotor calibration and uncertainty on the perception of peripersonal space."
Target selection for action depends not only on the egocentric location of objects estimated from retinal and extraretinal variables, but also on the assessment of current action possibilities. In the present study, we investigated the effect of altering sensorimotor anticipation processes on subsequent perceptual estimates of reachability. To do so, we conducted two experiments in which we changed the relation between visual distance and movement amplitude. Experiment 1 showed that iterative visuomotor adaptation to distorted visual feedback (in steps of ±15 mm, up to a total adaptation of ±75 mm) led to a congruent variation of perceived reachable space, although the first introduction of the shifted visual feedback produced a reduction of perceived reachable space whatever the direction of the feedback shift. Experiment 2 showed that increasing uncertainty about visuomotor performances, by providing a visual feedback randomly shifted in depth (±7.5 mm), produced the same reduction of perceived reachable space in the absence of visuomotor adaptation. Taken together, these data suggest that the visual perception of reachable space depends on a motor-related perceptual system, which is affected by both visuomotor recalibration and reliability of the visuomotor system.
Affiliation
Research Unit in Cognitive and Affective Sciences, University Lille Nord de France, B.P. 60149, 59653, Villeneuve d'Ascq Cedex, France.
Journal Details
This article was published in the following journal.
Name: Attention, perception & psychophysics
ISSN: 1943-393X
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22688494
- DOI: http://dx.doi.org/10.3758/s13414-012-0316-x
Medical and Biotech [MESH] Definitions
Space Perception
The awareness of the spatial properties of objects; includes physical space.
Placebo Effect
An effect usually, but not necessarily, beneficial that is attributable to an expectation that the regimen will have an effect, i.e., the effect is due to the power of suggestion.
Depth Perception
Perception of three-dimensionality.
Uncertainty
The condition in which reasonable knowledge regarding risks, benefits, or the future is not available.
Space Simulation
An environment simulating one or more parameters of the space environment, applied in testing space systems or components. Often, a closed chamber is used, capable of approximating the vacuum and normal environments of space. (From NASA Thesaurus, 1988) This also includes simulated EXTRAVEHICULAR ACTIVITY studies in atmosphere exposure chambers or water tanks.
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