Recent large scale reviews of evidence-based practices also support the effectiveness of PRT. The approach was nominated as one of 11 “Established Treatments” by the National Autism Center in 2009. That is, it was considered to be effective for individuals on the autism spectrum, a conclusion supported by 14 well controlled studies undertaken
between 1987 and 2008. The National Autism Center’s report is consistent with an earlier analysis by Simpson (2005) who examined 250 articles about autism interventions and found only four with strong evidence, one of these being PRT. In another review, PRT was deemed sufficiently versatile to use at home, in clinical settings, in an
inclusive classroom, and in the community. Of the ten state-of-the-art autism treatments identified by the National Research Council of the National Academy of Sciences, it is the only one identified for use in all four of these settings (National Research Council, 2001)