Is this grammatically correct? Test level reliability is important to ensure there is not too much variation in the test scores. This ensures consistency and accuracy in the assessment being determined by the test. High reliability is important to show the test produces consistent scores through internal consistency. According to Billings and Halstead (2020), one method used to measure internal consistency is the split-half method. The test is split into two equal halves. Scores are compared between the halves to determine how consistently the test measure the material being assessed. Tests are often divided into even and odd questions to compare scores. The reliability scale is measured from 0 to 1.00. A test with good reliability should score above 0.80