Accession Number : ADA294317

Title :   Stochastic Models of Attention and Search.

Descriptive Note : Final technical rept. 1 Mar 92-28 Feb 95,

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF PSYCHOLOGY

Personal Author(s) : Yantis, Steven

PDF Url : ADA294317

Report Date : FEB 1995

Pagination or Media Count : 16

Abstract : Seven lines of experimentation have been carried out over three years. In the first set of experiments, the PI has tested and rejected a two- process model of visual attention allocation. He has proposed an alternative perceptual sampling model and performed stochastic simulations of the model to show that it can account for certain aspects of human performance in cued visual search tasks. In the second set of experiments, the PI has found evidence that observers perceive occluded objects across time, a finding that complements an analogous alibi to perceptually complete partially occluded objects across space. Several lines of experimentation have been carried Out using a bistable apparent motion display (the Ternus display) as a tool to explore the assignment of object identity over time. For example, the PI has found evidence that a common mechanism may underlie the perception of bistable apparent motion and the capture of visual attention in certain visual search tasks, and he has discovered that perceptual grouping by proximity can precede the assignment of motion correspondences in bistable apparent motion.

Descriptors :   *MATHEMATICAL MODELS, *STOCHASTIC PROCESSES, *VISUAL PERCEPTION, *ATTENTION, SIMULATION, PERFORMANCE(HUMAN), MOTION, DISPLAY SYSTEMS, SEARCHING, SAMPLING, ALLOCATIONS, BISTABLE DEVICES.

Subject Categories : Anatomy and Physiology
      Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE