Abstract
Designers consider cars' proportions using their past experiences and knowledges. However, designers may not search for all patterns of proportion satisfy requirements. In this paper, we aimed to clarify relationships between mini-cars' proportion items and users' impressions. First, we clarified correlations among the proportion items of existing 25 mini-cars using principal component analysis, and created 9 mini-cars' images using the design of experiments. Second, we conducted impression evaluation experiments for 95 subjects using the images. As a result, we clarified relationships between the proportion items and subjects' impressions. Third, we classified subjects into 6 clusters using the difference of their preferences, and clarified the patterns of proportion items that each cluster's subjects feel attractive. Finally, we conducted the evaluation re-experiment for 2 clusters' 20 subjects using the images with the patterns of proportion items preferred by them. As a result, we found strong correlations between mini-cars' heights and their preferences.
