How many consecutive perfect scores are needed before stopping for the Scale of Intelligence?

In the context of the Wechsler Intelligence Scale for Children - Fifth Edition (WISC-V), stopping rules are important for determining when to conclude testing in order to ensure that the assessment is both efficient and effective. A stopping rule of two consecutive perfect scores indicates that the child has demonstrated sufficient understanding and mastery of the material being tested.

By achieving two consecutive perfect scores, it shows consistency in performance, which is a strong indicator that the child has comprehended the concepts and skills evaluated in those sections. This measure helps to avoid unnecessary testing and ensures that the assessment process respects the child's time and attention span while still providing valid results.

Other options would not effectively ensure a reliable assessment result. For instance, stopping after just one perfect score may not provide adequate confirmation of the child's capabilities, leaving potential gaps in understanding unassessed. Similarly, three or five consecutive perfect scores may lead to overly extensive testing that is not needed when the child's level of proficiency is already established. Therefore, two consecutive perfect scores is both a practical and reliable method for determining when to stop testing.