Accuracy of recognition memory for common sounds

Memory for 194 common sounds recorded in high fidelity was tested with a confidence-rated “yes-no” recognition task. Recognition d’ was about 1.74 for both individual and group presentation and test. Performance was equivalent to between 85% and 89% correct in two-alternative forced-choice testing, a level considerably greater than the 69% for sounds found by Miller & Tanis (1971). Memory capacity for sounds is probably not exceeded with 194 items.