Task Participants performed a task to test communication devices developed by the Information Systems Team at the University of São Paulo. The task was set up as a game in which the goal was to reach as many bubbles displayed on an 11-inch computer monitor, forming seven rows and 18 columns with a total of 126 bubbles. This required individuals to be able to use a range as is typically required in communication systems. The task was divided into two phases: (1) the first phase was characterized by identification of dexterity zone or range of reach, in which the subject had to touch ("burst") the largest possible number of bubbles (changing bubble color from blue to gray) in a set time of 30 seconds, identifying the range zone; (2) the second phase was characterized as the persecution stage, at this time the researcher defined a central bubble (usually chosen in the center of the skill area, on the bottom line), which changed the color to red. From this moment the individual pursued random bubbles that appeared in their range zone, alternating with a return to the central bubble. This phase was carried out for 30 seconds. To motivate, the task randomly provided bubbles outside the range zone and generated a greater challenge to the individual. The software generated information of the coordinates x, y (row and column) where the bubble was touched and the time the bubble was touched. During task execution, the participant received feedback of the number of bubbles touched, the remaining playing time and the total number of points obtained in attempts, thus observing the performance of the participants.