Perceptual factors and meanings of symbolic information elements. Volume I, executive summary.

Mode of access: Internet.

Perceptual factors and meanings of symbolic information elements. Volume II, technical report.

Mode of access: Internet.

The perceptual factors in reading; a quantitative study of the psychological processes involved in work perception.

Columbia contributions to philosophy and psychology, vol. XVII, no. l.

Perceptual thresholds of non-visual locomotion.

Part II written by Bryant J. Cratty and Harriet G. Williams.

On the scheduling of training conditions for the acquisition and transfer of perceptual-motor skills.

Includes bibliography.