This study explores the underlying mechanisms responsible for the perception of cadential closure in Mozart’s keyboard sonatas. Previous investigations into the experience of closure have typically relied upon the use of abstract harmonic formulæ as stimuli. However, these formulæ often misrepresent the ways in which composers articulate phrase endings in tonal music. This study, on the contrary, examines a wide variety of cadential types typically found in the classical style, including evaded cadences, which have yet to be examined in an experimental setting. The present findings reveal that cadential categories play a pivotal role in the perception of closure, and for musicians especially, ratings of the cadential categories provide empirical support for a model of cadential strength proposed in music theory. A number of rhetorical features also affect participants' ratings of closure, such as formal context, the presence of a melodic dissonance at the cadential arrival, and the use of a trill within the penultimate dominant. Finally, the results indicate that expertise modulates attention, with musicians privileging bass-line motion and nonmusicians attending primarily to the soprano voice.

Mirka (2009) has recently argued that the 18th-century metrical theories of Heinrich Christoph Koch can be revelatory for a reconstruction of contemporary ways of hearing Viennese high classicism. Koch’s claims revolve around interactions between the metrical placement of cadences and the articulation of specific beat levels, and these claims are most specific and testable for common time and 6/8. This paper reports two statistical surveys of works by Mozart that were designed to gauge the fit between the corpus and Koch’s theory. In the works examined, the theory was strongly supported for common time, strongly disconfirmed for 6/8, and weakly supported for the other meters encountered. It is argued that these results point toward caution regarding the use of Koch’s theories but not toward their outright rejection, and that unexpected statistical contrasts within the corpus indicate the need for a fine-grained approach to meter in music of the later 18th century.