The development of a reliable and valid instrument to measure levels of school administrator burnout is the objective of this research. The stages involved in the development and assessment of the Administrator Role Perception Inventory (ARPI) were item writing, field testing, participant selection, test administration, and data analysis. The instrument was mailed to the 2,113 members of the Confederation of Oregon School Administrators, with a 62% return. Multivariate and univariate analyses were used to assess internal consistency, content validity, and criterion validity in relation to self-perceptions and perceptions of peers' levels of burnout. Findings point to the need for recognition of burnout and the importance of wellness programs to enhance administrator effectiveness. Twelve tables provide statistical substantiation of the results. (10 references) (LMI)