Preeti Verghese

Biography

Preeti is currently an Associate Scientist at the Smith Kettlewell Eye Research Institute in San Francisco. She was an NRC Associate at the Vision Group at NASA Ames from May 1993 to January 1996 and worked on human ability to integrate speed information across space. She received a bachelors degree in Electrical Engineering from the Indian Institute of Technology, Madras, India in 1984, and a Ph. D in Neuroscience from Syracuse University in 1990. She spent two years as a postdoctoral fellow at the Perception Lab in Harvard before moving to Ames. Her research interests are in the areas of visual perception, particularly in visual search and speed perception. She is a member of the Association for Research in Vision and Ophthalmology and the Society for Neuroscience.

Publications

• VERGHESE, P. & PELLI, D. G. (1992). The information capacity of visual attention. Vision Research 32, 983-995.
• VERGHESE, P. & PELLI, D. G. (1994). Scale bandwidth of visual search. Vision Research 34, 955-962.
• VERGHESE, P. AND NAKAYAMA, K. (1994). Stimulus discriminability in visual search. Vision Research 34, 2453-2467.
• VERGHESE, P. & STONE, L. S. (1995). Integration of speed information across space. Vision Research, 35, 2811-2823.
• VERGHESE, P. & STONE, L. S. (1996). Perceived visual speed constrained by image segmentation. Nature 381, 161-163.
VERGHESE, P. & STONE, L. S. (1997). The effect of spatial layout on speed perception. Vision Research 37, 397-406. VERGHESE, P., WATAMANIUK, S.N.J., MCKEE, S.P. & GRZYWACZ, N.M. (1998). Local motion detectors cannot account for the detectability of an extended trajectory in noise. Vision Research (in press).

MANUSCRIPTS

• VERGHESE, P., MCKEE, S.P. & GRZYWACZ, N.M. (1998). Stimulus configuration determines the detectability of motion signals in noise. Submitted to Vision Research. PALMER, J., VERGHESE, P. & PAVEL, M. (1998). The psychophysics of visual search. To be submitted.

THESES

• "The information capacity of visual attention," Ph.D. thesis, July 1990. Supervisor, Prof. Denis G. Pelli, Institute for Sensory Research, Syracuse University.
• "A data acquisition system for the signal analysis of the human electromyogram," undergraduate thesis, May 1984, Indian Institute of Technology, Madras, India.

ABSTRACTS

• VERGHESE, P. & STONE, L. S. (1995). Spatial factors in the integration of speed information. Investigative Ophthalmology and Visual Science (Suppl.) 35: S635.
• VERGHESE, P. & STONE, L. S. (1994). Constraints on neural mechanisms underlying the spatial integration of speed information. Society for NeuroscienceAbstracts 20: 318.
• VERGHESE, P. & STONE, L. S. (1994). Integration of speed information across space. Investigative Ophthalmology and Visual Science (Suppl.) 34: 2077.
• VERGHESE, P. & PELLI, D. G. (1992). Scale specificity of visual search. Perception 21 (Suppl. 2): 107.
• VERGHESE, P. AND NAKAYAMA, K. (1992). Different tradeoffs in visual search: discriminability, duration, and number. Investigative Ophthalmology and Visual Science (Suppl.) 33:1355.
• VERGHESE, P. AND NAKAYAMA, K. (1991) Implications of a limited processing capacity for visual search tasks. Investigative Ophthalmology and Visual Science (Suppl.) 32:840.
• FARRELL, B., PELLI, D. G., & VERGHESE, P. (1991). Can we attend to large and small at the same time? Investigative Ophthalmology and Visual Science (Suppl.) 32:715.
• VERGHESE, P. & PELLI, D. G. (1990). The information capacity of visual attention. Investigative Ophthalmology and Visual Science (Suppl.) 31:562.
• VERGHESE, P. (1989). Effect of spatial extent and bandwidth on attentive tasks. Investigative Ophthalmology and Visual Science (Suppl.) 30:159.
• VERGHESE, P., PELLI, D. G. & BARLOW, H. B. (1988). Detecting the absence of motion. Investigative Ophthalmology and Visual Science (Suppl.) 29:407.
• VAN DOREN, C. L., LANNI, G. L., VERGHESE, P., VERRILLO, R. T., AND GESCHEIDER, G. A. (1985). Effects of aging on vibrotactile temporal resolution. Journal of the Acoustical Society of America (Suppl.) 78: S17.

Pointers

Present Email:

preeti@skivs.ski.org

Present Address:

Smith Kettlewell Eye Research Institute

2232 Webster Street

San Francisco CA 94115

Phone:

(415) 561-1648

(415) 561-1610(FAX)