“…Most of this research has utilized language samples from typical speakers who were preschoolers and toddlers (Benajee, Dicarlo, & Stricklin, 2003;Fallon, Light, & Paige, 2001;Marvin, Beukelman, & Bilyeu, 1994); adults in a variety of contexts (Balandin & Iacono, 1999;Beukelman, McGinnis, & Morrow, 1991;King, Spoeneman, Stewart, & Beukelman, 1995;To¨nsing & Alant, 2004); or aging older adults (Stuart, Vanderhoof, & Beukelman, 1993;Stuart, Beukelman, & King 1997). Word lists based on language samples from like individuals (Yorkston, Smith, & Beukelman, 1990), and language activity monitoring (Hill & Romich, 1999) of individuals who use AAC, have also been used to study vocabulary.…”