Why is it important for a child to wait until they are prompted to start the test?

The importance of waiting to be prompted before starting the test primarily revolves around ensuring that the child fully understands the instructions provided. Clarity in instructions is crucial for accurate performance, as it allows the child to grasp what is expected of them during the assessment. This understanding helps minimize confusion and maximizes the child's ability to demonstrate their true cognitive abilities, rather than being hindered by misinterpretation of the task. When children wait for a prompt, it also reinforces the assessment environment, which is designed to help them perform at their best.