I came across two more papers that are very much worth taking a look at if you are interested in modeling vowel category learning. This paper by Schwartz and colleagues proposes a model of speech perception with what looks like an interesting connection between production and perception. Relevant to our concerns, it has a brief discussion to feature economy in vowels, with an early Ohala reference, and also some fascinating data on speaker-to-speaker variation in vowel height boundaries (which is correlated with production differences!) This paper by Sonderegger and Yu proposes a Bayesian analysis of compensation for coarticulation, and discusses some possible extensions to the modeling of change at the end. It builds on the work by Feldman and colleagues that I mentioned in class.