The study examines the usability of the "Cancellation" subtest in the Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV) from the perspective of executive function. The researchers divided 412 children who received WISC-IV at their developmental evaluation center into three groups based on their intellectual level, with 30 children randomly selected from each group (total of 90 participants). They compared the index scores and scaled scores for each group and classified the cancellation procedures into six types. The results showed that as intellectual level increased, the "Cancellation" scaled score was lower compared to other subtests. Additionally, the scaled score was lower for cancellation procedures that followed a systematic linear strategy. The study concluded that the "Cancellation" subtest is important for assessing qualitative aspects of test results, especially in high- intellect children with developmental disabilities. It suggests that future assessments should incorporate the "Cancellation" subtest to detect executive function disabilities such as poor planning ability or persistence.The study examines the usability of the "Cancellation" subtest in the Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV) from the perspective of executive function. The researchers divided 412 children who received WISC-IV at their developmental evaluation center into three groups based on their intellectual level, with 30 children randomly selected from each group (total of 90 participants). They compared the index scores and scaled scores for each group and classified the cancellation procedures into six types. The results showed that as intellectual level increased, the "Cancellation" scaled score was lower compared to other subtests. Additionally, the scaled score was lower for cancellation procedures that followed a systematic linear strategy. The study concluded that the "Cancellation" subtest is important for assessing qualitative aspects of test results, especially in high- intellect children with developmental disabilities. It suggests that future assessments should incorporate the "Cancellation" subtest to detect executive function disabilities such as poor planning ability or persistence.