Recent research has shown that speakers are sensitive to non-contrastive phonetic detail present in nonnative speech (e.g. Escudero et al. 2012; Wilson et al. 2014). Difficulties in interpreting and implementing unfamiliar phonetic variation can lead nonnative speakers to modify second language forms by vowel epenthesis and other changes. These…

In this dissertation we examine the effects of pronunciation instruction on the perception of a novel L2 contrast. The novel contrast in this case is the glottal fricative which results in Spanish from the suppression buccal gestures of /s/ in the word-medial coda position. This process which occurs in Spanish, but not English is known as…