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Towards User-Friendly Spelling with an Auditory Brain-Computer Interface: The CharStreamer Paradigm

Figure 4

Usability ratings for the three conditions.

Plot A shows the global subjective ratings for each condition. The overall preference for daily use is indicated for each participant by a tick mark. Arrows indicate, if larger or smaller ratings are better. Plot B depicts the average rating, of how well the user could focus on the target letter during each trial in the calibration.

Figure 4

doi: https://doi.org/10.1371/journal.pone.0098322.g004