A test that measures what it intends to measure is said to be

A test is considered valid if it accurately measures what it is intended to measure. This is a fundamental characteristic of any good assessment tool, ensuring that the inferences drawn from test scores are appropriate, meaningful, and useful. For example, a valid math test should genuinely assess mathematical abilities and not, inadvertently, reading comprehension or test-taking skills. Validity is not an all-or-nothing concept; rather, it's a matter of degree, and there are various types, such as content validity, criterion-related validity, and construct validity, each addressing different aspects of measurement accuracy. Without validity, a test's results can be misleading, leading to incorrect conclusions about a student's knowledge or skills. While reliability refers to the consistency of results, and objectivity to the absence of bias, validity is paramount because it ensures the test's relevance and accuracy in fulfilling its stated purpose.