The increasing diversity of the U.S. population has resulted in increased concerns about the psychological assessment of students from culturally and linguistically diverse backgrounds. To date, little empirical research supports recommendations in test selection and interpretation, such as those presented in the Culture-Language Interpretative Matrix (C-LIM). The current investigation was conducted to empirically evaluate the validity of the C-LIM classifications for the Woodcock-Johnson Tests of Cognitive Abilities, Third Edition (WJ III COG). The WJ III Normative Update standardization sample was used to determine the extent to which the two dimensions of the C-LIM (i.e., cultural loading and linguistic demand) influence performance on 20 of the WJ III tests. Results provide support for a re-classification of the C-LIM. Implications for research and school psychology practices are discussed.