Fig. 6. LIP/thumb throughput comparison percentage.
considered near the device limit) also for the multidirectional task. We can conclude that the lower lip achieved 59.2% of the thumb-controlled LCS throughput for multidirectional task. Fig. 6 shows the percentages for each task.
Fig. 6 shows a consistent percentage tendency for the three tasks, with mean 62.2% and standard deviation 3.2%. In short, the lower lip was able to control a human–computer interface reaching 62.2% of the thumb throughput.