The efficacy of ACCESS was initially addressed in an open clinical trial, after which it was
examined in a recently completed four-year, multi-site randomized controlled trial study,
funded by the Institute of Education Sciences (IES) in the United States Department of
Education. Findings from both trials lend strong support to its efficacy. To assist others
interested in implementing ACCESS, we have created a treatment manual, developed training
videos, and published our findings in research journals.