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Updated: Jul 6, 2026

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
Published on: April 11, 2025
Tracking the changing features of multiple objects: progressively poorer perceptual precision and progressively
Christina J Howard1, Alex O Holcombe
1Department of Experimental Psychology, University of Bristol, Bristol BS8 1TU, UK. Christina.Howard@bris.ac.uk
Abstract:
To measure the limits on attentive tracking of continuously changing features, in our task objects constantly changed smoothly and unpredictably in orientation, spatial period or position. Observers reported the last state of one of the objects. We observed a gradual decline in performance as the number of tracked objects increased, implicating a graded processing resource. Additionally, responses were more similar to previous states of the tracked object than its final state, especially in the case of spatial frequency. Indeed for spatial frequency, this perceptual lag reached 250ms when tracking four objects. The pattern of the perceptual lags, the graded effect of set size, and the double-report performance suggest the presence of both serial and parallel processing elements.
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