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Autism is a pervasive developmental disorder with prevalence rates increasing yearly. Autism is characterized by impaired social interaction, specific language abnormalities, behavioural stereotypes, and a range of cognitive deficits. The presence of symptoms and the severity impairments vary from individual to individual with deficits ranging from non-verbal and severe intellectual disabilities, to high-functioning. Currently, there is no cure for autism. However, intensive behavioural intervention (IBI) is gaining worldwide popularity as the treatment of choice. Intensive behavioural interventions have roots in applied behavioural analysis. The efficacies of the methodologies that have been used worldwide have varied. This paper compares the original IBI program developed by Lovaas with the current program used by the Toronto Partnership for Autism Services. Research is needed to determine what aspects of IBI are most effective for children with autism, which children benefit the most, if IBI is needed on a continued basis to maintain gains that are made, and if IBI programs are cost-effective for the government.
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