Mentoring research to date focuses on outcomes related to program goals and theoretical background, and almost all of these relate to the experience of the mentee. Very little research has been completed on the other side of the dyad--the mentor--despite the fact that mentor expectations and experience contribute significantly to the perceived benefits and success of the intervention. This study explores the principal components of the mentor experience: motivation, commitment, self-efficacy beliefs and perceived quality of program support. An overview of a new instrument designed to evaluate the connection between mentor self-efficacy and perceived program support is presented. Initial exploratory factor analysis and associated reliability estimations extracted 3 factors and indicate that the proposed M-SEPPS instrument has more than adequate reliability estimates (total scale a = 0.89) and should proceed to a confirmatory factor analysis. This instrument is designed to enable mentor/tutor organizations to identify and assess program infrastructure, mentor self-efficacy, and the relationship between the two constructs. [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/en-US/products/dissertations/individuals.shtml.]