On the similarities between the perception and production of elliptical trajectories

Experimental Brain Research
Nava Levit-BinnunTamar Flash

Abstract

In an earlier study, Viviani and Stucchi (J Exp Psychol Hum Percept Perform 18:603-623, 1992) have introduced a visual illusion, whereby it was shown that when subjects are asked to determine what movement of a light spot, when tracing an elliptical trajectory, appears to be most uniform, they tend to choose movements that are close to obeying the 2/3 power law (Lacquaniti et al. Acta Psychol 54:115-130, 1983) rather than constant speed movements, even though the actual changes in velocity could exceed 200%. Here we have extended the study of this illusion by directly testing the effect of the shape (eccentricity) and size (perimeter) of the elliptical trajectory, the duration of the tracing of the ellipse and the effect of fixation on the subjects' decision regarding movement uniformity. We found that the ellipse's eccentricity and tracing out speed of the elliptical trajectory significantly affect the subjects' decisions, although the effect of eccentricity seems to be stronger than that of speed. Our findings also indicated that fixation significantly affects the subject's decision for ellipses that are more eccentric. Surprisingly, the ellipse's perimeter had a much smaller effect on the subjects' decisions, although change...Continue Reading

References

Aug 1, 1992·Journal of Experimental Psychology. Human Perception and Performance·P Viviani, N Stucchi
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Apr 5, 2007·Biological cybernetics·Tamar Flash, Amir A Handzel

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Citations

Apr 5, 2007·Biological cybernetics·Tamar Flash, Amir A Handzel
Nov 26, 2009·Cerebral Cortex·Antonino CasileMartin A Giese
Jul 14, 2009·PLoS Computational Biology·Daniel BennequinTamar Flash
Jul 7, 2009·PLoS Computational Biology·Felix PolyakovTamar Flash
Mar 29, 2014·PloS One·Barbara La ScaleiaPaolo Viviani
Dec 15, 2007·Proceedings of the National Academy of Sciences of the United States of America·Eran DayanTamar Flash
Sep 14, 2014·Cerebral Cortex·Eran DayanTamar Flash
Mar 22, 2016·Parkinsonism & Related Disorders·Rivka InzelbergTamar Flash
Jul 26, 2008·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Giuseppe Pellizzer, Pascal Zesiger
Aug 6, 2008·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Frank E PollickTamar Flash
Dec 17, 2008·Journal of Neurophysiology·Uri MaozTamar Flash
Oct 11, 2013·Journal of Neurophysiology·Uri Maoz, Tamar Flash
Dec 8, 2017·Human Brain Mapping·Koji FujitaDavid Eidelberg

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