What action should be taken after the third score of 0 in PS?

When evaluating a child's performance on the Wechsler Intelligence Scale for Children - Fifth Edition (WISC-V), specific guidelines are in place to support a standardized administration of the test. Encountering three consecutive scores of 0 on the Performance Scale (PS) indicates that the child is unable to answer questions at this level of difficulty, suggesting significant challenges in the skills being assessed.

Discontinuing the test after this pattern of scoring allows for a more accurate interpretation of the child's abilities without potentially frustrating the child further or resulting in a longer testing process that may not yield any additional useful data. It ensures the test remains a fair measure of the child's capabilities, rather than pushing them through items they are not equipped to handle.

Other actions, such as continuing testing, starting over, or switching to a different subtest, may lead to inaccurate results and an unfair assessment of the child's cognitive skills, as these methods would disregard the standard procedures designed to evaluate performance accurately and effectively. Therefore, after the third score of 0 in PS, discontinuing the test is the appropriate and recommended course of action.