 After field testing with the Ohio State University Research Foundation, Pimsleur and his associates found that these sections could be taken out of the test without affecting the predictive ability of the PLAB.In a discussion of the MLAT and PLAB, Wesche (1981)  noted that PLAB part 4 is a measure of inductive learning of foreign language grammar, while the MLAT (mentioned above) does not include a direct measure of inductive learning.She further notes that PLAB part 5 also measures the inductive learning of foreign language tones in different contexts.