“…In fact, research suggests that different low tech AAC strategies, used in conjunction with natural speech, may be promising interventions for increasing intelligibility by enhancing listeners' contextual knowledge (Hustad & Beukelman, 2001;Hustad & Garcia, 2002). 1 Specifically, alphabet supplementation (Beukelman & Yorkston, 1977;Crow & Enderby, 1989;Hustad & Beukelman, 2001;Hustad & Garcia, 2002), topic supplementation (Carter, Yorkston, Strand, & Hammen, 1996;Dongilli, 1994;Garcia & Cannito, 1996;Hustad & Beukelman, 2001), and combined supplementation (Beliveau, Hodge, & Hagler, 1995;Hustad & Beukelman, 2001) have all been shown to increase intelligibility significantly, relative to habitual speech. 2 Each of these strategies serves to provide listeners with different kinds of contextual information about the content of the speaker's message.…”