This thesis is documentation of my efforts to define my process as actor in creating the roles of Harriet and Kate in An Experiment With an Air Pump. The document includes research, character analysis, development of the roles, rehearsal journal, and an evaluation of my performance. An Experiment With an Air Pump was produced by the University of New Orleans Department of Film, Theatre, and Communication Arts. The play was performed in the Robert E. Nims Theatre of the Performing Arts Center at 7:30 pm on November 4 through 6 and November 11 through 13, and at 2:30 pm on November 14. The play was also submitted as the University of New Orleans entry in the Kennedy Center American College Theatre Festival. It was performed at the Louisiana State Theatre Festival on November 17 at 1 p.m.