Minimal research has investigated training packages used to teach professional staff how to implement functional analysis procedures and to interpret data gathered during functional analysis. The current investigation used video-based training with role-play and feedback to teach six professionals in a clinical setting to implement procedures of a brief functional analysis. A multiple-probe across participant pairs design was used to assess the effectiveness of the training package. Results indicated that following intervention, all participants were able to implement procedures of a brief functional analysis with a high degree of accuracy. The investigation also sought to extend the literature on training visual analysis of graphed data. Results of this phase indicated that the visual analysis of all four participants improved after lecture-based instruction. [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.]