This article reports on a study designed to validate the Gatekeeping Attitude Index, a 14-item Likert scaling index. The authors collected data from a convenience sample of social work field instructors (N = 188) with a response rate of 74.0%. Construct validation by exploratory factor analysis identified a 2-factor solution on the index after four ambiguous items were eliminated. The 2-factor solution achieved modest construct validity with a mean factor-total correlation Pearson's r of 0.63 (p [less than or equal to] 0.05). Computed Cronbach's alpha was 0.74. Subscale internal consistency reliability coefficients ranged between 0.71 and 0.62. Modification of the Gatekeeping Attitude Index is recommended. (Contains 3 tables.)