Richard Murray, PhD

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				Richard Murray, Ph.D. Assistant professor Department of Psychology 3401 Walnut Street, room 312C Philadelphia, PA 19104-6228 tel (215) 573-3365 fax (215) 746-6848 rfmurray@psych.upenn.edu www.psych.upenn.edu/~rfmurray Click here for selected publications since Dr. Murray's arrival at Penn RESEARCH INTERESTS visual psychophysics, spatial vision, perceptual organization, visual attention; natural image statistics in relation to shape from shading and perceptual organization; signal detection theory, ideal decision theory, multiple spatial frequency channel theory RESEARCH TECHNIQUES psychophysics; mathematical and computational modelling RESEARCH SUMMARY Visual information is so ambiguous that it is difficult to understand how we see at all. Part of the solution to this problem must be that the human visual system makes use of statistical regularities in the visual world, to arrive at accurate interpretations of ambiguous images. Murray's research uses experimental, computational, and mathematical approaches to determine what statistical regularities are available in the visual world, and which of these regularities are exploited by the human visual system. KEY WORDS: visual psychophysics; perception of shape; mathematical and computational modelling