Cite as:
Leirós L I, Blanco M J, 2005, "Visual tracking of dynamic stimuli with and without eye movements" Perception 34 ECVP Abstract Supplement

Visual tracking of dynamic stimuli with and without eye movements

L I Leirós, M J Blanco

Observers were instructed to track with or without eye movements a subset of three objects in a field of eight moving objects for a sustained period of several minutes. The eight objects moved randomly and uninterruptedly at a constant velocity, although the three relevant objects were maintained grouped, during the entire task, in a virtual triangle of constant area but varying in shape. One of the five irrelevant objects was displayed at the inner region of the virtual triangle at any given time. At random intervals, a target stimulus of brief duration appeared within any of the eight objects and observers were required to identify it. Results indicated that tracking with eye movements was best when the target appeared within a relevant object or within an irrelevant object displayed outside the area of the virtual triangle. However, when the target appeared within the interior irrelevant object, performance without eye movements was as good as performance with eye movements. These results suggest that eye movements may interfere with the perception of spatial relations among dynamic stimuli.

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