Intrusive and epenthetic vowels revisited

The distinction drawn in Hall (2006) between epenthetic and intrusive vowels has
been widely used in descriptive and theoretical work, and also challenged. This
paper reviews some of the work that has engaged with the theory, in agreement
or disagreement. This includes experimental approaches; proposed extensions to
vowels inserted in other positions; and work arguing that vowels differ along a
continuum rather than falling into these two classes. I argue that the dichotomy of
presence/absence of a gesture is still a useful concept, while acknowledging that
this is not the only important distinction among inserted vowels. An expanded
typology recognizes subclasses among both intrusive and epenthetic vowels, as
well as the possibility of alternation between epenthesis and intrusion.