This paper looks into the results of the exploration of corpus data from PRESEEA for "y" and perceived lenghtened "y" in order to determine if there is a relation between perceived durational lengthening and topic shift in Spanish conversations.
Villalobos Cardozo, M., Ludivine, C., & Degand, E. (2021). Markers of local and global discourse structure in dialogue: from production to prediction. Discourse in corpus and experimental data: Bridging the methodological gap, Online. https://hdl.handle.net/2078.5/242804