1. Graduate School of Design, Kyushu University, Fukuoka, Japan
2. Faculty of Design, Kyushu University, Fukuoka, Japan; Research Center for Applied Perceptual Science, Kyushu University, Fukuoka, Japan
3. Faculty of Design, Kyushu University, Fukuoka, Japan
4. Japan Society for the Promotion of Science, Tokyo, Japan; Research Center for Applied Perceptual Science, Kyushu University, Fukuoka, Japan