Abstract
As the method of research, image words contributed to the attitude of purchasing the lighting equipment design were calculated by multiply regression analysis, and cognitive parts affected to each image word of the lighting equipment design were extracted by rough sets. Five image words "not-satiety, like an adult, not old-fashioned, style in living room, Japanese style" in sixteen contributed to purchasing were calculated using the data evaluated into five steps about each image word on the subject of thirty students. Next, the relationship between four images and cognitive parts was extracted based on the decision class using the data of each image word and an attitude. From the result, the hierarchical relation from the attitude to cognitive parts about purchasing has been clarified. Furthermore, after making design concepts from the result, three design sketches were proposed. And, verification of sketch proposals was also conducted.
