UTAGS Reliability
R. Steve McCallum, Bruce A. Bracken · 2023
The study of test reliability centers on estimating the degree of variance that is known to be true or reliable, as opposed to the error associated with scores. When reliability is investigated, results are usually reported in terms of a coefficient that is a specific use of the common correlation coefficient and ranges from 0. Coefficient alphas for Universal Talented and Gifted Screener (UTAGS) subscales were computed using Cronbach&s;s method; coefficient alphas for the composite were computed by using Guilford&s;s formula designed for this purpose. Test-retest estimates of stability reflect the extent to which a student&s;s test performance is consistent over time and are used to estimate time sampling error in a test. This reliability approach involves administering the test and then readministering it generally 2 to 4 weeks later. In the case of UTAGS, two members of staff who were familiar with the test&s;s scoring procedures independently scored 31 complete UTAGS protocols drawn at random from the normative sample.