As the rates of Autism Spectrum Disorder (ASD) increase, so does the need to provide high-quality and empirically validated supports across the lifespan. Despite most of an individual's life taking place in adulthood, it is well-documented that the supports and services for adults with ASD are severely lacking. This is evidenced by outcomes indicating that many adults on the spectrum are unemployed, underemployed, or do not have appropriate services. Challenging behavior is one of the most significant barriers to accessing community participation and employment. Individuals with ASD who present with challenging behavior require empirically validated methods that lead to function-based treatment. Trial-based functional analysis (TBFA) is a method of determining the function of behavior that is well-suited to community settings. However, adult services often lack the resources and qualified staff required to conduct specialized assessments, such as TBFAs. There is a need for empirically validated training methodologies (e.g., Behavioral Skills Training) coupled with strategies that reduce required resources (pyramidal training) to improve the outcomes for adults with ASD. The purpose of this study was to determine if a functional relation exists between: (a) pyramidal Behavioral Skills Training (BST) on the training of TBFA conducted by graduate students for center-employed job coaches and (b) the accuracy of implementation of TBFA conducted by job coaches. Specifically, I taught three graduate students to train job coaches to conduct a TBFA and measured the effects with a multiple probe single case design study. [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://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]