同心円錯視と図地関係-1-
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概要
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The purpose of this research is to examine the relationships between the displacement-effect of the inner circle of double concentric circles and their figureground reversal. The diameters of the inner circles were kept constant (40mm), while those of the outer varied (from 44 to 160mm).1) In each case the total length of time during which each area of the figures was perceived as a "figure" was measured in continuous observation, The result was that, despite considerable individual differences, to appear the average total time for the inner circle as a "figure" gradually increased with the increasing size of the outer circle. The opposite tendendy was found in the case of the annulus (the ringshaped area). Besides, the perceived size of the inner circle was almost the same as was previously found (Morinaga, 1935; Ogasawara, 1952). That is, the maximum amount of the displacement-effect was obtained when the ratio between the diameters of these two circles was about 2:3. Thus it seems difficult to find any particular correspondence between these two phenomena.2) With the same stimulus-figures, we compared the perceived size of the inner circle when appeared as a "figure" with that size when the annulus appeared as a "figure". These different conditions gave rise to some divergent outcomes, These differences, however, were on the absolute amount and not of the relative amount of the displacement-effect.3) The perceived size of the inner circle was measured using a series of stimulus-figures of two kinds; that is, the inner circle easily perceived as a "figure" (by adding lines to the inner circle or making it a disk), and the annulus made easily seen as a "figure" by the same means. Some different tendencies of the displacement-effect were found under these two conditions These differences seem to depend mainly on the geometrical stimulus-differences produced by the two different kinds of figures.
- 公益社団法人 日本心理学会の論文