A comparison was made of Durrell Analysis of Reading Difficulty and informal reading inventory (IRI) independent and instructional level designations for 15 children, aged 9 to 11 years, who had been referred to a diagnostic clinic for reading assessment. The children's reading performance was first scored according to procedures outlined in the Durrell Analysis manual, and a second scoring was made according to recommendations for administering informal reading inventories given by M. S. Johnson and R. A. Kress. Results suggested that the procedures yield significantly different overall grade level designations. Further analysis of the significant reading level by scoring procedure interaction showed that (1) the average independent level established by the Durrell Analysis procedure was significantly higher than that obtained by the IRI procedure, and (2) the instructional level mean was significantly higher than the independent level mean only when the IRI procedure was used. (FL)