Objectives : In Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV), full scale intelligence quotient (FSIQ) and the index scores are thought to be solely important and supplemental subtests are not taken into account in the score.However, in assessment by intelligent tests it is required that we analyze the result from many directions. Accordingly, the factor of “Cancellation” was taken up and the importance of adding a focus on the qualitative side of the test results was examined. Methods : Some 412 children who received WISC-IV in our developmental evaluation center were divided into three groups according to their intellectual level, and of these, 30 persons were assigned to each group [total of 90] selected at random to comprise the sample. By comparing the index scores and the scaled scores for each group,we have classified the procedures of deletion into six types. Results : The more the intellectual level increases, the lower the “Cancellation” scaled score becomes compared to the other subtests. Further, the scaled score was lower in the type of deletion procedure such as systematic linear strategy. Conclusion : In the high intellect level group, the scaled “Cancellation” score was lower than the other subtests, it was thought to be because there were many “order type” subjects using a systematic linear strategy. It was also considered that attention to the qualitative aspects as well as quantitative is important in “Cancellation”. Therefore, when assessing high intellect children with developmental disabilities in the future, a clinical examination that incorporates “Cancellation” to detect executive function disabilities such as persistence or poor planning ability is desirable.