EFFECTS OF DIFFICULTIES IN EXECUTIVE FUNCTIONS ON BEHAVIORAL AND ADAPTIVE PROBLEMS IN ITALIAN AUTISTIC PRESCHOOLERS

Objective: To describe the relationship between executive functions (EF) and symptom's severity, behavioral problems, and adaptive functioning in autistic preschoolers. Method: Seventy-six autistic preschoolers (age-range: 37-72 months; SD: 8.67 months) without intellectual disability were assessed. Executive functions were measured by both performance-based (Battery for Assessment of Executive Functions-BAFE-) and indirect measures (Behaviour Rating Inventory of Executive Function- Preschool Version-BRIEF-P); adaptive skills were assessed using the Vineland Adaptive Behavior Scales Second Edition (VABS-II); ASD severity was evaluated through the ADOS-2 and the SCQ; the Child Behavior Checklist (CBCL 'V2-5) questionnaire was used to describe the emotionallbehavioral profile. Results: A considerable rate of autistic preschoolers showed weaknesses in one or more measures of EF, in particular in inhibition and working memory at both performance-based and parent report measures. EF measures explained a significant proportion of variance in the emotionallbehavioral profile, and in the adaptive skills, particularly in the socialization domain. Specifically, the most relevant EF predictors are Inhibition, Emotional Control and Cognitive Flexibility subscales of the BRIEF-P. Conclusions: Assessment of EF in autistic preschoolers may identify those children at higher risk for emotionallbehavioral problems and adaptive difficulties. EF are a crucial target for early intervention in preschoolers with autism with the potential to improve child outcomes.