Wallace, J. ., Karr, J. ., Schatz, P. ., Worts, P. ., Covassin, T. ., & Iverson, G. . (1969). The Frequency of Low Scores on ImPACT in Adolescent Student-Athletes: Stratification by Race and Socioeconomic Status Using Multivariate Base Rates. Developmental Neuropsychology, 47(3), 125-135. https://doi.org/10.1080/87565641.2022.2034827 (Original work published 1969)