[Effect of tone on perception of figures in children (author's transl)]

This experiment was designed to examine the effect of tone on the perception of figures in children, presenting a tone together with figures. On the basis of studies concerning sensory interaction, the factors producing perceptual changes of figures were also examined. It was found that the change of figure perception was caused by tones, not by suggestions nor by differences in pitch. Significant difference was obtained between the conditions with and without tones. The changes in color, shape, size, position and color shade were observed. As the extreme case of the inhibitional effect of color shades, the disappearance of figure perception was also observed. The results obtained in this experiment were discussed in relation to the sensory developmental study.