Although, recent reviews and outcome research support empirical evidence for Early Intensive Behavior Intervention in University and community settings, research has also indicated that not all intensive behavioral service provisions are equally effective. Therefore, it was necessary to comprehend key variables that are common to empirically validated programs. This paper provides a research-based comprehensive EIBI model which has been recently implemented in Italy. Important components include post-diagnostic provision, complementary treatment in clinical setting by professionals and parent-mediated in the child's natural environment, treatment based on applied behavior analysis-verbal behavior, staff and parent training, as well as evaluation of progress. (Contains 3 tables.)