Validity and reliability are two important concepts in assessment. Here is an explanation of each term:
Validity refers to how well a test measures what it claims to measure. A test has high validity if it assesses the specific skills or knowledge it is intended to assess. For example, a math test should accurately measure a student's math skills and knowledge, not other unrelated abilities. Ensuring validity is important so that test scores can be meaningfully interpreted and used.
Reliability refers to the consistency of test scores. A reliable test would produce similar results if the same person took it multiple times, or if two raters scored a student's work. Reliability is concerned with whether a test provides consistent measurement. A test with