According to Boyd et al (2014), in their comparison of LEAP, TEACCH and standard teaching practices
“All three programs were found to produce statistically significant changes in children’s outcomes across the school year. This finding may shift the field’s thinking around [comprehensive treatment models] designed for students with ASD. Perhaps it is not the unique features of the models that most contribute to child gains; instead it is the common features of the models that most influence child growth… Early analysis of the overlap of scores on the fidelity measures indicate that perhaps those components common to the intervention approaches (e.g. classroom organization, teacher interaction with students and families) account for outcomes more than components that are unique to each approach (e.g. peermediated instruction in LEAP classrooms, structured work systems in TEACCH classrooms)”.