Fig. 2.

Percent correct, averaged over participants, as a function of session block (five sessions to a block) in three conditions: (1) when the stimulus set in the absolute identification experiment contained four tones (baseline set = {25, 30, 35, and 40 dB SPL}); (2) when the stimuli consisted of the baseline set plus a 50-dB SPL tone (B + 50); and (3) when the stimuli consisted of the baseline set plus an 80-dB SPL tone (B + 80)