Thesis Supervisor: Associate Professor Allison Bruhn Copyright by JING ZHU 2019 All Rights Reserved ii ACKNOWLEDGEMENTS Throughout my four years of study and the completion of this dissertation, I have received a great deal of support and assistance from my professors, colleagues, family, and friends. First and foremost, I would like to express the deepest appreciation to my advisor, Dr. Allison Bruhn. Thank you for guiding me through this difficult process in becoming a scholar; thank you for always being available whenever I needed suggestions; thank you for all the positivity to lift me up when my confidence was down. The past year has been wonderful and absolutely memorable in my life, and I truly wish the completion of my dissertation is not the end of our collaboration but a start of our new journey. With great continuing gratitude, I wish to thank those professors with whom I have worked with during the last four years in various capacities: Dr. Youjia Hua, for his guidance in the formulation of the research topic and methodology in particular, for his continued support even after he changed to a new job; Dr. Matthew O'Brien and Dr. Linda Cooper-Brown, for all the meaningful and inspiring discussions of how to apply knowledge into practice; Dr. Shawn Datchuk, Dr. Stewart Ehly, and Dr. Armeda Wojciak for their time and support through this study. Special thanks to my colleagues Neil Burton and Ashley Rila. Thank you for assisting me through the writing process and helping me to improve my writing skills. I am grateful to many of my friends and colleagues: I appreciated all the inspiring conversations and have learned from all of you. Most importantly, I want to thank my parents for their understanding, support, and unconditional love. The faith that they hold on me gives me the confidence to continue with this journey, to make my dream come true.iii ABSTRACT Treatment integrity has a direct impact on early intensive behavioral intervention (EIBI) outcomes for children with autism. Research suggests that providing feedback can improve treatment integrity in EIBI. The purpose of this study was to compare the effects of two remote feedback methods, videoconference feedback and email feedback, on treatment integrity.Participants included six teachers who were providing EIBI to children with autism in China.Using a single-case alternating treatment design, each feedback method was associated with a specific teaching procedure, either discrete trial training or incidental teaching. The teachers implemented the two teaching procedures daily but only received feedback during intervention.Results showed that videoconference feedback produced faster mastery of the teaching procedures and better treatment integrity sustainability after the intervention was removed than email feedback. Treatment integrity deterioration was observed during maintenance and follow up.Results of generalization were mixed. In social validity evaluations, teachers expressed preference of videoconference feedback over email feedback in terms ...