prov:value
| - Even some norm-referenced English-based measures that address this level of development provide opportunities to examine the use of gaze, gesture, and vocal forms of communication, including the CSBS DP (Wetherby & Prizant, 2002), the PLS-4 (Zimmerman et al., 2002), and the Sequenced Inventory of Communicative Development, Revised Edition (Hedrick, Prather, & Tobin, 1995).
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