In this study, a concurrent randomized multiple baseline across three parent-child dyads single-case design was employed to evaluate the effects of a brief three-week parent training program, titled Practiced Routines. The Practiced Routines parent training program included positive behavior supports (PBS) and mindfulness strategies within the context of natural family routines. Three mothers and their children with autism spectrum disorder (ASD) participated. Visual analysis combined with a standardized mean difference analysis revealed mixed results with a medium effect found for increases in parent behavioral strategy use and small effects found for reductions in parent stress and child challenging behavior. All three mothers rated the social validity of the Practiced Routine program favorably. Implications for science and practice in educational and behavior health early intervention for families of children with ASD are discussed. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]