抄録
In public places, generally, MSW can be separated into combustible waste, incombustible waste, PET bottle and CAN. In this study, authors have focused on trash bin color, since it might give non-negligible impacts on human behaviors on waste separation. Therefore, this study investigated color preferences of trash bins, in particular focusing on its structural correlation. In this research, web questionnaires data was used to scale the color preference by binary pairwise comparison method. 10 common different colors for trash bin were decided. In web questionnaires, questionees were requested to only answer the better color in each pair by imagination. The selection ratio dataset was analyzed to quantify the preference degree (Z value) using Thurston’s law of comparative judgment. Based on this, authors comparing the preference structure of the most preferable colors with other colors. Investigation of gender balance and age distribution has been conducted to the groups with low consistency. According to the web-questionnaires, the most preferred colors were red for combustible waste; gray for incombustible waste; white for PET bottle; gray for CANs, respectively. In general, colorful design is more preferable, elder people relatively preferred lighter colors relatively.
