Describes language as a vehicle of thought severely limited by auditory, kinesthetic, and visual images, restricted to linear succession, and precariously linked to meaning by standardized labels. (MB)

Based on the more general principle that all thinking (including reasoning) is basically perceptual in nature, the author proposes that visual perception is not a passive recording of stimulus material but an active concern of the mind. He delineates the task of visually distinguishing changes in size, shape, and position and points out the…