Hollow-face錯視における顔テクスチャ・呈示方向・光源位置の効果

The effects of the facial texture, stimulus orientation and light direction on the hollow-face illusion

Yoshida Hiroshi

広島大学大学院教育学研究科紀要. 第三部, 教育人間科学関連領域

Bulletin of the Graduate School of Education, Hiroshima University. Part. Ⅲ, Education and Human Science

In the present study, the strength of hollow-face illusion was measured using psychophysical method (computer controlled double-staircase). Stimuli were threedimensional stereo images of laser scanned female face, rendered varying facial texture (positive, negative or no texture), stimulus orientation (upright or inverted), and light direction (top- or bottom-lit). Three-factorial experimental design investigated how these factors affect the illusion. The results showed the significant main effects of all factors. Hollow-face illusion was stronger for the stimulus with positive texture than with the negative or no texture. Upright face showed stronger illusion than inverted. Light from bottom increased illusion as compared with the light from top. First order interactions showed that the effect of texture was significant only for the upright face, and that the effect of light direction reversed if the stimulus orientation was inverted. In addition, second order interaction showed that the light direction had no effect for inverted negative face. These interaction patterns were complex, but were explained simply in terms of the tendency that the more face like pattern causes the more hollow-face illusion.

hollow-face 錯視

顔の知覚

3次元形状の知覚

hollow-face illusion

face perception

three-dimensional shape perception

Psychology [ 140 ]

jpn

広島大学大学院教育学研究科

[ISSN] 1346-5562

[NCID] AA11625039