Dr. Miller uses correlations to create profiles of strengths and weaknesses of WJ IV cognitive and achievement subtests for various ages for each disability area. He answers questions about how he uses scientific statistical methods to achieve the evidence of these patterns. He cautions against not using IQ tests and explains how neuropsychological studies and psycho-educational have started to overlap. He wants us to understand the theory behind the tests we use and go beyond the standard scores to interpret the results.