Abstract
An acceleration or deceleration in the rate of music is described as a tempo drift. This study investigated tempo drift and how tempo drift might be influenced by a sliding frequency shift. Drifts of 10% or greater in tempo tended to be accurately detected; however, those judgments were somewhat affected by the type of music. Continuous sliding frequency shifts that paralleled the tempo drift improved the accuracy of tempo drift judgments. When frequency shifts were independent from a tempo drift, they produced an illusory experience of the tempo change. Findings are reported with their implications for music and time perception.
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