Variables of the Sensory Code
Customarily four dimensions are distinguished in the world of stimuli and in the matching world of sensations. Boring (1933), for example, distinguished the sensory dimensions of quality, intensity, extensity, and protensity. The corresponding stimulus dimensions were defined by Hensel (1966b) as quality, intensity, space, and time. It is implied that each stimulus, as also each sensation, may vary along any one of these scales, independently of the other three. In this vein, Hensel (1966b) proposed that the sensorium be represented by an N by 4 matrix, with N major sensory modalities (such as sight, hearing, taste, touch, and the others) and 4 stimulus dimensions in each modality.
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