There have been many rich, naturalistic studies documenting prelinguistic communicative abilities that suggest that the ntegration of alternating eye gaze, vocal behaviors, and nonverbal gestures are indicative of intentional communication (e.g., ates, Camaioni, & Volterra, 1975; Bates, Benigni, Bretherton, Camaioni, & Volterra, 1979; Dore, 1974; Ninio & Bruner, 1978; revarthen & Hubley, 1978)....