An Exploratory Study of Executive Function Development in Children with Autism, after Receiving Early Intensive Behavioral Training.

: To examine the development of executive functions, in preschool children with autism spectrum disorders (ASD), receiving early intensive behavioral training (EIBI). : Executive functions (EF) were assessed with The Behavior Rating Inventory of Executive Function - Preschool Version (BRIEF-P), by parents and preschool teachers at the time of diagnostic assessment and after 15 months of EIBI intervention. Ten children with ASD ( = 2.9 years, nine males) participated in the study. Reliable Change Index scores were computed for each of the participants in order to investigate any significant change in BRIEF-P T-scores. : Three children showed a significant improvement in EF, based on parent ratings. Four children showed a significant improvement in EF based on preschool teacher ratings. : Findings indicating a reliable improvement in one third of preschool children with ASD receiving EIBI are encouraging but need to be replicated in larger scale controlled studies.