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I wish to express my gratitude to many people who helped make this study possible. To Dr. John McGuire, my thesis advisor, I express my sincere appreciation for guiding me, encouraging me, and sometimes prodding me along through the writing and research process. He gave much of his personal time to reading and critiquing this study. Without his guidance, this project would not have reached completion. I also wish to express my thanks to Dr. Sheree Martin and Dr. Paul Smeyak for their willingness to serve on my thesis committee. Their suggestions added to the quality of this study.