觸空間に於ける距離の知覺
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概要
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This investigation studies the manner in which tactual perception of distance is dependent upon the structure of the stimulus.<BR>Ten series of experiments were performed by the method of constant stimuli with seven observers for successive comparison of "filled" with "empty" distances. (1) The stimuli were applied to the skin of the forehead of the observer just above the eyebrows in successive pairs; the standard stimulus comprising a "filled" distance was presented first, followed by a comparison stimulus comprising an "empty" distance. The observer was asked to judge the second in terms of the first, using the categories, greater, equal or less. An aesthesiometer specially constructed for each series was used to give the stimuli. The results were treated statistically and the point of subjective equality was calculated for each series and for each observer.<BR>The following may be given as a summary:<BR>(1) When a distance of 30 mm. was divided into 2,3 or 5 equal parts by punctiform pressure stimuli, the impression perceived was a line, a chain or a rosary, and the distance appeared tactually much shorter than the "empty" distance of equal length, i. e. two punctiform pressures separated by a distance of 30 mm.<BR>(2) The above statement also applies unqualifiedly to the case where a distance of 80 mm was divided into 4 equal pagts, and where a distance of 111,114o r 120 mm. was divided into 6 or 7 pagts by punctiform stimuli.<BR>(3) When a distance of 30 mm. wasfilled uniformly with pressure, the impgession pegceived was a line, and the distance was greatly undegestimated in comparison to the "empty" distance of equal length.<BR>(4) When a distance of 80 mm. was divided into 2 parts or when a dis tance of 111, 114 or 120mm. was divided into 3 equai Parts, it was Perceived tactually as seParate dots intersPersed along the whole space,and the distance was neither overestimated nor underestimated.<BR>(1) There were three other series which treated the Probiem of "time error". The result showed, however, that there is no time error in the successive comparison of distance in tactuai space.
- 公益社団法人 日本心理学会の論文