Modelling short- and long-term statistical learning of music as a process of predictive entropy reduction

Publikation: KonferencebidragPaperForskningpeer review

  • Niels Christian Hansen
  • Psyche Loui, Department of Psychology and Program in Neuroscience and Behavior, Wesleyan University, USA
  • Peter Vuust
  • Marcus Pearce, Centre for Digital Music and Centre for Research in Psychology, Queen Mary, University of London, Storbritannien
Statistical learning underlies the generation of expectations with different degrees of uncertainty. In music, uncertainty applies to expectations for pitches in a melody. This uncertainty can be quantified by Shannon entropy from distributions of expectedness ratings for multiple continuations of each melody, as obtained with the probe-tone paradigm. We hypothesised that statistical learning of music can be modelled as a process of entropy reduction. Specifically, implicit learning of statistical regularities allows reduction in the relative entropy (i.e. symmetrised Kullback-Leibler Divergence) between listeners’ prior expectancy profiles and probability distributions of a musical style or of stimuli used in short-term experiments.

Five previous probe-tone experiments with musicians and non-musicians were revisited. In Experiments 1-2 participants rated expectedness for tonal melodies and Charlie Parker solos. Experiments 3-5 tested participants before and after 25-30 mins exposure to 5, 15 or 400 melodies generated from a finite-state grammar using the Bohlen-Pierce scale.

As predicted, we found between-participant differences in relative entropy corresponding to degree and relevance of musical training, and within-participant decreases in entropy after short-term statistical learning of novel music. Thus, whereas inexperienced listeners make high-entropy predictions, following the Principle of Maximum Entropy, statistical learning over varying timescales enables listeners to generate melodic expectations with reduced entropy. These findings are consistent with the Free-Energy Principle, which has been proposed as a unified theory for brain function.
OriginalsprogEngelsk
Udgivelsesår2015
StatusUdgivet - 2015
BegivenhedInternational Conference on Interdisciplinary Advances in Statistical Learning - Basque Center on Cognition, Brain, and Language, Ibaeta University, San Sebastian, Spanien
Varighed: 18 jun. 201527 jun. 2015

Konference

KonferenceInternational Conference on Interdisciplinary Advances in Statistical Learning
LokationBasque Center on Cognition, Brain, and Language, Ibaeta University
LandSpanien
BySan Sebastian
Periode18/06/201527/06/2015

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