What is the primary reason Mrs. Andrews was advised to redo her testing?

The primary reason for advising Mrs. Andrews to redo her testing revolves around the concern that students may have relied on color instead of shape attributes. This indicates that the assessment did not effectively measure the intended skills or knowledge area that the test was designed to evaluate. When testing cognitive abilities or understanding of specific attributes, it’s essential that students focus on the relevant characteristics—in this case, shape—rather than potential distractors like color. If the design of the test allows for such reliance on a less relevant attribute, it compromises the validity of the results.

This highlights the importance of thoughtful test construction, where the items are carefully designed to truly assess the targeted skills without allowing alternative strategies to take precedence. By ensuring that assessments present clear distinctions that students must engage with meaningfully, educators can gather accurate data regarding student understanding and capabilities.