“…The pairwise variability index (PVI) was originally conceptualized as the normalized duration difference between adjacent syllables in connected speech and used to characterize speech rhythm and stress in neurotypical speakers who use different languages and dialects (Low, Grabe, & Nolan, 2000). Direct application to running speech has been possible for communication disorders that do not primarily affect linguistic fluency (Knight & Cocks, 2007; Maruthy, Venugopal, & Parakh, 2017) and, when modified for comparisons at the word level, the PVI has contributed to research addressing lexical stress development in children (Arciuli & Ballard, 2017; Arciuli & Colombo, 2016; Ballard, Djaja, Arciuli, James, & van Doorn, 2012) and the differentiation between AOS and aphasia (APH).…”