This study aimed to obtain knowledge for improving usability through motion characteristics analysis based on peak velocity of drag on touch screens. We conducted an experiment in which an object was dragged to a target position. The drag direction and distance were adopted as experimental factors. Ten subjects participated in this study; their average age was 23.6 years. The results showed that the fingertip movement for drag corresponded well with the performance model based on Fitts’ law, and the usability decreased under the conditions with relatively long distance excepting the right direction. The peak velocity of dragging was almost linearly related to the distance to the target and was higher in the horizontal direction than in the vertical direction. Since the corrective movement for positioning at the target accounted for more than half of the drag movement, operation support for the corrective movement may improve usability.

One of the important Kansei values of automobiles is engine sound. Engine sound determines the character of a car and is an important element for branding. However, since popular cars sold around the world have diverse preferences for customers in each region, they will inevitably be developed to reflect the demand for improvement of mass production cars while compare with the level of competing cars. It is same for engine sounds, and when providing engine sounds with new Kansei values, a different approach is required. Therefore, in this research, we used Kansei engineering, devised a new process to realize engine sound of a new concept, and verified its usefulness. Specifically, we introduce an example of engine sound design based on the concept of “Woody sound”.