“…IDS has been shown to serve various functions such as regulating attention (Cooper & Aslin, 1989; M. Papoušek, 1996; Pomerleau, Malcuit, & Desjardins, 1993), expressing emotion (Fernald & Simon, 1984; Trainor, Austin, & Desjardins, 2000), and supporting the perception of linguistically relevant units (Fernald & Mazzie, 1991; Werker et al, 2007) by providing a basis for infants' segmentation of syntactic clauses, bootstrapping language development (Christophe, Dupoux, Bertoncini, & Mehler, 1994; Johnson & Seidl, 2008; Nazzi, Jusczyk, & Johnson, 2000). Less attention has been paid to the role of prosodic markers in organizing vocal turn taking and supporting the segmentation of sound into meaningful units that are not primarily linguistic.…”