p. 50-51
We had two experiments to know how creative thinking was done. Firstly, a design task was assigned with two keywords of different difficulties in form making. As the result, designer seemed to change his thinking way depending on the difficulties of keywords in design process. Secondly, we assigned a task of "Design a chair which makes feel sad". As the result, different paths in a thinking way were shown. One was using metaphors of sad feeling and the other was using metaphors of concept of sadness. Most of creative results were seen in the former case. From these results, we concluded that the creative thinking required high level abstraction which had long thinking path with effort of thinking in drawings.