TY  - JOUR
PY  - 1998//
TI  - Prolonged weightlessness, reference frames and visual symmetry detection
JO  - Acta astronautica
A1  - Leone, G.
A1  - de Schonen, S.
A1  - Lipshits, M.
SP  - 281
EP  - 286
VL  - 42
IS  - 1-8
N2  - We evaluated the influence of prolonged weightlessness on the performance of three cosmonauts to bilateral symmetry detection in the course of a 15-day-long Russian-French mission CASSIOPEE 96 aboard the MIR station. We tested the influence of weightlessness on subjects' performance as a function of the retinal orientation of axis of symmetry. as a function of type of stimuli (closed versus multi-elements shapes) and as a function of visual field presentation (at fixation, left visual field. right visual field). The results indicate firstly a difference between presentation at fixation versus away of fixation. Away of fixation, no effect of microgravity on performance was shown. A hypothesis of hemispheric specialization for symmetry detection was not supported as well. At fixation, an effect of micro-gravity was shown and more interestingly, the effect was quite different as a function of type of shapes used. suggesting that symmetry detection is a multiple-stage process.<p /> <p>Language: en</p>
LA  - en
SN  - 0094-5765
UR  - http://dx.doi.org/
ID  - ref1
ER  -