I would like to thank my advisor Dr. Lauri Jensen-Campbell for her mentoring, with the project. Her countless hours of feedback made this thesis possible. I would also like to thank my other two committee members, Drs. Mark Frame and Jared Kenworthy for their contributions. Their guidance certainly helped with the progress and completion of the project as well. I thank Dr. Perry Fuchs for allowing me to use his pain stimulus machine in addition to offering technical support. A special thanks to Katy Rollings for her constant support during the analysis phase. Her patience and assistance was invaluable. Of course I would like to thank all the undergraduate research assistants in the Social and Personality Laboratory who assisted me in gettin...