Conjoint Analysis for Causal Relationship among Thermal Sensation Votes

Abstract

To analyze the causal relationships between thermal comfort and thermal sensation votes, this paper presents how conjoint analysis works in experimentation. The samples for the experimentation consisted of 1,584 (22 subjects x 9 conditions x 8 times) questionnaire data and the thermal sensations are voted for face, chest, hands, buttocks, and soles of the foot. To use conjoint analysis, the samples are preprocessed such that each thermal sensation vote is either OK or NG and the combination of OK and NG covers as variety as possible. Using SPSS for the votes, we have confirmed the lower body is more important than the upper body in controlling thermal comfort. The comparison with multi-regression analysis is also shown.