RELATING PERCEPTION AND PRODUCTION OF SIMPLE RHYTHMIC PATTERNS - EXPLANATION OF THE REGRESSION EFFECT -
The so-called regression effect is often observed in the rhythm perception and production domain: a sequence of durations is perceived as more contrasted then they are performed, while the same rhythms are produced as less contrasted. The current study offers a possible explanation to this effect by relating perception and production of simple rhythmic patterns using a Bayesian framework. Thirty-six pianists took part in three independent experiments involving perception (identification), production (synchronization) and familiarity judgments tasks of three-interval rhythmic patterns. Indeed, the regression effect was observed. Applying the results of the familiarity judgments as a prior probability of rhythmic categories, Bayes' rule was used to predict perception data from the obtained production data, and the difference between perception and production could be considerably reduced.