A Study on Pupil Variation in Linguistic Order in Insight Problem Solving

Product design including interface design requires creative thinking by designers. This creative thinking brings out new concepts by externalizing and reinterpreting images through sketching or verbalization. In other words, creative thinking can be treated as an insight problem. Therefore, it is considered that the cognitive load will differ between geometric order such as sketching and order such as verbalization during insight problems. In addition, previous research in insight problems have shown that pupil dilation increases significantly just before an insight occurs. Based on this phenomenon, it is expected to obtain guidelines for externalization in creative thinking. In this study, the difference between geometric order and linguistic order was analyzed by pupil diameter during solving insight problem. Specifically, we adopted a sudoku as a geometric order and a crossword puzzle as a linguistic order. As a result of the analysis, it was confirmed that pupils before solving the insight problem tended to be larger in the linguistic order than in the geometric order.