In 2021, two very interesting systematic reviews appeared on the efficacy of Augmentative Alternative Communication in the linguistic enhancement of children with neurodevelopmental disorders. Crowe and colleagues [1] is even a mega-review (ie a systematic review of systematic reviews). The result is this extraordinary table that summarizes all the systematic reviews analyzed showing results and recommendations. The general conclusions reaffirm the effectiveness of PECS, AAC to modify behavior and develop social skills.

The second review, by Langarika-Rocafort and colleagues [2] focuses on primary school children with more than one diagnosis. The review shows a documented effectiveness of Augmentative Alternative Communication interventions in improving communication skills, in particular phonological awareness, vocabulary, the ability to make requests and the development of narrative skills. Above all, the achievement of better results is emphasized when children have the choice the preferred Augmentative Alternative Communication tool.


[1] Crowe B, Machalicek W, Wei Q, Drew C, Ganz J. Augmentative and Alternative Communication for Children with Intellectual and Developmental Disability: A Mega-Review of the Literature. J Dev Phys Disabil. 2021 Mar 31: 1-42. doi: 10.1007 / s10882-021-09790-0

[2] Langarika-Rocafort A, Mondragon NI, Etxebarrieta GR. A Systematic Review of Research on Augmentative and Alternative Communication Interventions for Children Aged 6-10 in the Last Decade. Lang Speech Hear Serv Sch. 2021 Jul 7; 52 (3): 899-916. doi: 10.1044 / 2021_LSHSS-20-00005

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deictic gesturespeech analysis