Angular Foot Movement Time Variability in Foot-Based Interaction

In the foot-based interaction studies, the typical pattern of foot movement is to lift the foot, move horizontally or vertically to approach an input button, and then click the button. This study is a research on angular foot movement in which the heel is fixed in one place and the foot/leg is rotated to approach the input button. The participants’ posture (sitting/standing) did not affect the foot movement time. According to the previous studies, the time required in the other types of foot movement was shorter in the standing position than in the sitting position. It took less time to move the feet in the space on the front right side of the body than in the front center of the body. This indicates that it is effective to place the input device on the front right side of the worker’s body rather than the front center of the body in the input task requiring angular foot movement. On the other hand, the input task requiring angular foot movement can be explained and predicted by Fitts’ law, similarly to the input task requiring the other types of foot movement.