Previous studies suggested that tonality induction is based on the pitch-class related information a sequence shows. However, Anta (2013b) found that, even if that information is kept constant, pitch dispersion (i.e., the distance in pitch/semi- tones between tones) affects tonality induction; specifically, it was found that the larger the distance between pitches, the weaker the induction, and vice versa. The aim of the present study was to assess whether the results found in Anta (2013b) were due to variability in the local dispersion of pitches, or in their global dispersion (i.e., due to the distance between successive pitches or between all pitches in general, respectively). The analyses conducted here suggest that tonality induction is affected by the local dispersion of pitches.
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