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. 2013 Dec 12;8(12):e82995. doi: 10.1371/journal.pone.0082995

Figure 1. Instructions displayed on the touchscreen for performing tinnitus matching using the likeness rating method.

Figure 1

Participants initiated a trial by pressing the green button. They had to rate how the tone contributed to their tinnitus on the 10-point scale. Then, they had to match its loudness by moving the gauge on the left side. When this was done, they could press the red button to initiate the next trial.