Early intensive behavioral interventions have become a very popular treatment in the field of autism spectrum disorders. Given the rapidly expanding use of these methods and the amount of money and resources being devoted to these programs, analyses of these practices is warranted. This paper looks at treatment studies on the topic. The children treated were largely diagnosed with pervasive developmental disorder not otherwise specified or autism diagnoses. One-to-one training was typical as were structured curriculums. The implications of these practices are discussed along with assertions about future direction for research.