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Clinical Trial
. 2005 Apr;31(2):235-47.
doi: 10.1037/0096-1523.31.2.235.

Multiple-object tracking is based on scene, not retinal, coordinates

Affiliations
Clinical Trial

Multiple-object tracking is based on scene, not retinal, coordinates

Geniva Liu et al. J Exp Psychol Hum Percept Perform. 2005 Apr.

Abstract

This study tested whether multiple-object tracking-the ability to visually index objects on the basis of their spatiotemporal history-is scene based or image based. Initial experiments showed equivalent tracking accuracy for objects in 2-D and 3-D motion. Subsequent experiments manipulated the speeds of objects independent of the speed of the scene as a whole. Results showed that tracking accuracy was influenced by object speed but not by scene speed. This held true whether the scene underwent translation, zoom, rotation, or even combinations of all 3 motions. A final series of experiments interfered with observers' ability to see a coherent scene by moving objects at different speeds from one another and by distorting the perception of 3-D space. These reductions in scene coherence led to reduced tracking accuracy, confirming that tracking is accomplished using a scene-based, or allocentric, frame of reference.

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