Abstract
Irrelevant variability of source characteristics imposes problems in maintaining perceptual accuracy of an intended message. The perceptual system appears to adjust for differences between sources in a time-consuming manner called normalization which has been investigated with speech stimuli. The present experiment sought to establish auditory normalization with music stimuli using an AX chord discrimination task. Stimuli consisted of four chords produced by five different instruments. Degree of instrument variability was manipulated within subjects by presenting stimuli in three normalization blocks: single instrument, multiple instrument, and multiple-mixed instrument. In these conditions instrument selection remained the same throughout a block of trials, differed across trials, or differed within and across trials. Significant expected differences in response latencies and task accuracy were observed for trials that were composed of different instruments, compared to trials having the same instrument. Results clearly indicate normalization in the perception of music. [Work supported by NSF.]
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