“…Complicated developmental profiles can profoundly disrupt production of conventional gaze, gestures and vocalizations in the context of social interactions. This, in turn, interrupts critical teaching and learning opportunities during the first months of life (Halle, Brady, & Drasgow, 2004; Iacono, Carter, & Hook, 1998; Olswang, Pinder, & Hanson, 2006; Paparella & Kasari, 2004; Pinder & Olswang, 1995; Pinder, Olswang, & Coggins, 1993). Early intervention for this population is crucial to teach behaviors that facilitate social engagement and joint attention (Arens, Cress, & Marvin, 2005; Goossens’ & Crain, 1987; Paparella & Kasari, 2004; Pinder et al, 1993; Pinder & Olswang, 1995; Reinhartsen, 2000; Wetherby, Yonclas, & Bryan, 1989; Woods & Wetherby, 2003).…”