The Revised Attribution Questionnaire (r-AQ) measures mental illness stigma. This study’s purpose is to evaluate the factor structure of the (r-AQ) and examine the validity of the factor structure in adolescents. A convenience sample (n = 210) of adolescents completed the r-AQ and these data were used in exploratory (EFA) and confirmatory factor analyses (CFA). The EFA established a five item single factor structure, which we called the modified r-AQ and captures the negative emotional reactions to people with mental illness, a domain of mental illness stigma. The CFA established the validity of the factor structure (χ2 = 2.4, df = 4, p = .659, TLI = 1.042, CFI = 1.00, RMSEA = .000). Internal consistency reliability for the scale was acceptable (α = .70). The modified r-AQ is a reliable and valid measure of the emotional reaction to people with mental illness.