An aggregate study of single-case research involving aided AAC: Participant characteristics of individuals with autism spectrum disorders
Highlights
► This meta-analysis investigated the impacts of AAC by participant characteristics. ► Participants with ASD and no additional diagnoses had the most promising outcomes. ► Preschool-aged participants had better outcomes than older participants. ► Participants in all categories and age ranges had moderate or better effects.
Section snippets
Literature search
A literature search focusing on aided AAC systems utilized with individuals with ASD was conducted. The following online databases were searched for literature published between 1980 and the first 6 months of 2008: Education Full Text, ERIC, Professional Development Collection, PsychINFO, and Social Sciences Full Text. The following keywords were included in the search for articles that contained at least one of the following: ASD, autism*, autism spectrum disorder*, Asperger*, Asperger syndrome
Descriptive summary of participants
Table 1 summarizes each study, including authors and years of article publication, participant ages, participant diagnoses, aided AAC system implemented, and participant outcomes (e.g., dependent variables).
Discussion
Aided AAC had at least moderate effects on participants across all age ranges and diagnostic categories. Specifically and reassuringly, effects for all disability categories indicate at least moderate effectiveness. Although considerably lower than that for other participants, effect sizes calculated for participants with ASD and multiple co-morbid disabilities should be viewed with caution because few articles included such participants, due to their low incidence in the population. Further,
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Cited by (0)
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References marked with an asterisk indicate studies included in the meta-analysis.