To measure task performance in the present study, participants were given a tapping-based task and allowed to correct errors. During the experiment, the time it took participants to complete each trial was recorded. However, the number of error corrections was not measured. In addition, the measure of tap accuracy was not considered. This is because the present study focused on the effects of elastic touchscreen and input devices. Such issues, while important, were thus excluded for a parsimonious model. A more detailed explanation of why only RTs for correct trials were chosen for analysis will be provided in Section 3.4. To measure subjective satisfaction with the tactile experience, participants were asked about the perceived feeling of pressing down on the surface, pleasantness, helpfulness, finger fatigue, and degree of elasticity. Specifically, fatigue when touching the screen with bare fingers or a stylus was limited to the fatigue in the finger. The concept of elasticity was defined as the degree to which individuals perceived differences in the touch sensation when pressing on a hard or soft-surface touchscreen with the index finger or with each of the styli with hard and soft tips. Thus, the concept of the degree of elasticity was considered the result of the interaction between the surface of the touchscreen and the input device across different degrees of hardness or softness. More importantly, it was determined whether fast task performance was associated with a high level of satisfaction.