Scaling of very, very short visual extents.
Using the magnitude estimation and production methods, the psychophysical function for very, very short visual extents was shown to be a straight line. The argument is made that the linearity of the psychophysical function is independent of past experience. Such a linear relation to plausibly due to the linearity of the transformation, through perceptual constancy, of the physical extents into apparent extents.
D004193:Discrimination Learning; D006801:Humans; D011601:Psychophysics; D012858:Size Perception; D014796:Visual Perception