A quarterly publication of the Autism Research Institute

The Autism Research Review International is quarterly publication of the Autism Research Institute

Fall, 2019 | Number 4, Volume 33

Gains from intensive early intervention are lasting

A new study from Europe indicates that the gains made by children with autism spectrum disorders (ASD) who receive early and intensive behavioral intervention (EIBI) last at least a decade. 

Dean P. Smith and colleagues followed up on 19 adolescents with ASD who had received two years of EIBI beginning around three years of age. After completing the intervention, which was based on the UCLA model, the children attended a variety of schools where they continued to receive interventions based on applied behavior analysis. 

The researchers report, “Results showed the participants significantly increased their cognitive and adaptive standard scores during the two years of EIBI, and that these gains were maintained at follow-up, 10 years after the EIBI had ended. Participants also showed a significant reduction in autism symptoms between intake and follow-up. At follow-up, none of the participants had received any additional psychiatric diagnoses, and none were taking any psychotropic medication.” 

They conclude, “Results indicate that treatment gains achieved in EIBI are maintained into adolescence.”


“Treatment gains from early and intensive behavioral intervention (EIBI) are maintained 10 years later,” Dean P. Smith, Diane W. Hayward, Catherine M. Gale, Svein Eikeseth, and Lars Klintwall, Behavior Modification, October 16, 2019 (epub prior to print publication). Address: Svein Eikeseth, Department of Behavioral Science, Oslo Metropolitan University, P.O. Box 4, St., Olavs Plass, Oslo N-0130, Norway,  [email protected].