Sergei Gepshtein
Nationality
Israel and USAFunction
Research ScientistFunction Description
Dr. Gepshtein studies perception and sensorimotor behavior using a combination of psychophysics, mathematical modeling, and electrophysiology.
Much of his current research uses normative modeling. Normative models define the best possible performance of a system under prevailing constraints. Such models help to establish a rigorous framework for experimental research; they illuminate much of the field of inquiry at once, in contrast to the purely experimental work that sheds light on one issue at a time. The studies of motion perception and movement planning illustrate this normative approach.
Dr. Gepshtein also serves as a visiting scientist at the Vision Center Laboratory of the Salk Institute for Biological Studies, USA, where he collaborates with Prof. Thomas D. Albright, toward better understanding of the neural mechanisms of sensory adaptation. This collaboration is funded by the Japanese National Institute of Natural Sciences.
What's New
Special Issue of Journal of Vision: Perceptual Organization and Neural Computation, 2008.
Symposium Perceptual organization in the processing stream at Fechner Day 2007, Tokyo, 20 October 2007. (The Annual Meeting of the International Society of Psychophysics.)
Gepshtein, S., Tyukin, I. and Kubovy, M. Why does the proximity principle fail in perception of motion? Proceedings of the Annual Meeting of the International Society of Psychophysics, 2007.
Symposium Visual Organization and Computation at the annual meeting of Vision Sciences Society, 11 May 2007, Sarasota, FL, USA.
Projects
- Economics of Motion Perception
- Sergei Gepshtein
- Lawful Perception of Apparent Motion
- Sergei Gepshtein
- Optimality of Human Movement
- Sergei Gepshtein
- Early Cortical Activity in Perceptual Grouping
- Andrey Nikolaev, Sergei Gepshtein
- Visual Organization and Computation
- Sergei Gepshtein
- Failure of the Proximity Principle
- Sergei Gepshtein
- Unsupervised Adaptive Optimization of Motion-sensitive Systems
- Peter Jurica, Sergei Gepshtein
- Orientation bias reflected in pre-stimulus EEG alpha activity
- Andrey Nikolaev, Sergei Gepshtein
- Perceptual organization and neural computation
- Sergei Gepshtein
- Closing the gap between ideal and real behavior
- Sergei Gepshtein
- Perceptual consequences of sensory measurements using receptive fields
- Sergei Gepshtein
- Sensory adaptation as an optimal redistribution of neural resources
- Sergei Gepshtein
- Postdoctoral Fellow, Vision Science, University of California at Berkeley, USA
- Ph.D., Psychology, University of Virginia, USA
- M.Sc., Neurobiology, Weizmann Institute of Science, Israel
- Gepshtein S., & Cooperman A. (1998). Stereoscopic transparency: a test for binocular vision's disambiguating power. Vision Research 38 (19), p. 2913-2932.
- Gepshtein, S. & Kubovy, M. (2000). The emergence of visual objects in space-time. Proceedings of the National Academy of Sciences, USA 97 (14), p. 8186-8191.
- Kubovy, M. & Gepshtein, S. (2003). Grouping in Space and in Space-Time: An Exercise in Phenomenological Psychophysics. In: Behrmann, M., Kimchi, R. & Olson, C. (Eds.) Perceptual Organization in Vision: Behavioral and Neural perspectives. Lawrence Erlbaum Association, Mahwah, N.J. p. 45-85.
- Gepshtein, S. & Banks, M. S. (2003). Viewing geometry determines how vision and touch combine in size perception. Current Biology 13 (6), p.483-488.
- Kubovy, M., Epstein,W., & Gepshtein, S. (2003). Foundations of visual perception. In A. F. Healy & R.W. Proctor (Eds.), Experimental Psychology (pp. 87–119). Volume 4 in I. B. Weiner (Editor-in-Chief) Handbook of psychology. New York, NY: Wiley.
- Banks, M. S., Gepshtein, S. & Landy, M. S. (2004). Why is spatial stereoresolution so low? Journal of Neuroscience 24 (9), p. 2077-2089.
- Gepshtein, S., Burge, J., Ernst, M. & Banks M. S. (2005). The combination of vision and touch depends on spatial proximity. Journal of Vision 5 (11):7, p. 1013-1023.
- Gepshtein, S. & Kubovy, M. (2005). Stability and change in perception: Spatial organization in temporal context. Experimental Brain Research 160 (4), p. 487-495. (Also see Bruno, N. 2005, TICS 9, 1-3.)
- Banks, M. S., Gepshtein, S. & Rose, H. F. (2005). Local cross-correlation model of stereo correspondence. Proceedings of SPIE: Human Vision and Electronic Imaging 5666, p. 53–61.
- Trommershäuser, J., Gepshtein, S., Maloney, L. T., Landy, M. S. & Banks, M. S. (2005). Optimal compensation for changes in task relevant movement variability. Journal of Neuroscience 25 (31), p. 7169-7178.
- Gepshtein, S., Seydell, A. & Trommershauser, J. (2007). Optimality of human movement under natural variations of visual-motor uncertainty. Journal of Vision 7 (5):13, p. 1-18. [Supplementary Materials]
- Gepshtein, S., Tyukin, I., & Kubovy, M. (2007). The economics of motion perception and invariants of visual sensitivity. Journal of Vision 7 (8):8, p. 1-18.
- Gepshtein, S., & Kubovy, M. (2007). The lawful perception of apparent motion. Journal of Vision 7 (8):9, p. 1-15.
- Nikolaev, A. R., Gepshtein, S., Kubovy, M. & van Leeuwen, C. (2008). Dissociation of early evoked cortical activity in perceptual grouping. Experimental Brain Research 186 (1), p. 107-122. [Project link]
- Jurica, P., Gepshtein, S., Tyukin, I., Prokhorov, D. & van Leeuwen, C. (2007). Unsupervised adaptive optimization of motion-sensitive systems guided by measurement uncertainty. Peer-reviewed article to appear in Proceedings of The Third International Conference on Intelligent Sensors, Sensor Networks and Information Processing 2007 (ISSNIP 2007): p. 179-184. [Abstract]
CV
Training
Selected publications
Neurotree