SPATIAL VISION WITHIN EGOCENTRIC AND EXOCENTRIC FRAMES OF REFERENCE (paper presented at the NASA Conference on Spatial Displays and Spatial Instruments, Asilomar, California, 3 Sept 1987)

  1. Howard, I.P.
Corporate Authors
York Univ, Toronto ONT (CAN) Human Performance Lab;Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
An understanding of the mechanisms underlying perceptual stability and spatial judgements requires precise definitions of relevant coordinate systems. An egocentric frame of reference is defined with respect to some part of the observer. An egocentric task is one in which the position, orientation or motion of an object is judged with respect to an egocentric frame of reference. A proprioceptive task is a special kind of egocentric task in which the object being judged is also part of the body. An example of a proprioceptive task is that of directing the gaze toward the seen or unseen toe. An exocentric frame of reference is external to the observer.
Date of publication
15 Sep 1989
Number of Pages
Reprinted from
Proceedings of the NASA Conference on Spatial Displays and Spatial Instruments, 1987
Microfiche filmed at DSIS;Originator's fiche received by DSIS

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