“…At segmental level, extant literature reports errors relating to the production of vowels such as alterations in length and quality (e.g. Ardila, Rosselli, & Ardila, 1988;Blumstein, Alexander, Ryalls, Katz, & Dworetzky, 1987;Graff-Radford, Cooper, Colsher, & Damasio, 1986;Gurd, Bessell, Bladon, & Bamford, 1988;Ingram, McCormack, & Kennedy, 1992;Miller, Lowit, & O'Sullivan, 2006;Perkins, Ryalls, Carson, & Whiteside, 2010) and tenseness (e.g. Ingram et al, 1992;Katz, Garst, & Levitt, 2008;Whitaker, 1982).…”