Copyright © American Speech-Language-Hearing Association From: Single-Subject Experimental Design for Evidence-Based Practice Am J Speech Lang Pathol. 2012;21(4):397-414. doi:10.1044/1058-0360(2012/11-0036) Legend: Number of correct responses and tongue clicks during discrete trial training sessions in Spanish (Sp.) and English (Eng.) using an alternating treatments design. From “Effects of language instruction on response accuracy and challenging behavior in a child with autism,” by Lang et al., 2011, Journal of Behavioral Education, 20, p. 256. Copyright 2001 by Springer Science+Business Media, LLC. Reprinted with permission. Date of download: 10/7/2017 Copyright © American Speech-Language-Hearing Association