The effect of the presence or absence of feedback, or immediate positive reinforcement, was studied at 3 performance levels: 88%, 75%, and 62% correct. TheBUDTIF(Block Lip and Down, Two‐Interval—Forced‐choice) experimental procedure was utilized. Signal‐to‐noise ratios were varied in a 104‐trial run (about 7 min) so as to maintain the desired performance level. The noise was set to 35 dB SL. One group of naive subjects was used; each subject was presented one of the 6 conditions of performance level and feedback for 5 consecutive runs. Another group of experienced subjects was presented with all 6 conditions in each of six 1‐h sessions. Threshold signal‐to‐noise ratios, intrarun variability of levels utilized, the time per run, and interrun variability were determined. No statistically significant and systematic effect of feedback was found.