Century Dictionary and Cyclopedia
- n. In psychophysics, the limen of dual impression for the skin or retina, as determined by the esthesiometric compasses or by the just noticeable separation of black dots on a white back-ground.
“It has been held that in order to be felt as two they must be far enough apart to have a spatial character, and hence the distance necessary for two points to be perceived has been called the 'space-threshold.”
“The experiments are intended to have reference chiefly to three questions: the space-threshold, fusion of touch sensations, and the perception of number.”
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