The American Journal of Occupational Therapy From: Effectiveness of Therapy Ball Chairs on Classroom Participation in Children With Autism Spectrum Disorders Am J Occup Ther. 2010;64(6):895-903. doi:10.5014/ajot.2010.09149 Legend: Time students spent out of seat or disengaged. (A) Total number of seconds Alex was out of seat each session. (B) Total number of seconds Jack was out of seat and disengaged each session. (C) Total number of seconds Roland was out of seat and disengaged each session. (D) Total number of seconds Samuel was out of seat and disengaged each session. (E) Total number of seconds Omar was out of seat and disengaged each session. (F) Total number of seconds Ricardo was disengaged each session. c = chair; b = therapy ball chair. Date of download: 11/11/2017 Copyright © American Occupational Therapy Association/AOTA Press