The Reliability and Validity of Weighted Composite Scores Export

@article{citeulike:2976722, abstract = {The scores on 2 distinct tests (e.g., essay and objective) are often combined to create a composite score, which is used to make decisions. The validity of the observed composite can sometimes be evaluated relative to an external criterion. However, in cases where no criterion is available, the observed composite has generally been evaluated in terms of its reliability. The analyses in this article are based on a simple, content-based model for the validity of the observed composite as an estimate of a target composite, based on a priori weights for the 2 tests. The results suggest that giving extra weight to the more reliable of the 2 observed scores tends to improve the reliability of the composite, and up to a point tends to improve its validity. Giving too much weight to the more reliable score can decrease the validity of the observed composite as a measure of the target composite.}, author = {Kane, Michael and Case, Susan M.}, citeulike-article-id = {2976722}, citeulike-linkout-0 = {http://dx.doi.org/10.1207/s15324818ame1703_1}, doi = {10.1207/s15324818ame1703_1}, journal = {Applied Measurement in Education}, keywords = {reliability, validity}, number = {3}, pages = {221--240}, posted-at = {2008-07-09 15:04:52}, priority = {2}, publisher = {Routledge}, title = {The Reliability and Validity of Weighted Composite Scores}, url = {http://dx.doi.org/10.1207/s15324818ame1703_1}, volume = {17}, year = {2004} }

TY - JOUR ID - citeulike:2976722 L3 - citeulike-article-id:2976722 N2 - The scores on 2 distinct tests (e.g., essay and objective) are often combined to create a composite score, which is used to make decisions. The validity of the observed composite can sometimes be evaluated relative to an external criterion. However, in cases where no criterion is available, the observed composite has generally been evaluated in terms of its reliability. The analyses in this article are based on a simple, content-based model for the validity of the observed composite as an estimate of a target composite, based on a priori weights for the 2 tests. The results suggest that giving extra weight to the more reliable of the 2 observed scores tends to improve the reliability of the composite, and up to a point tends to improve its validity. Giving too much weight to the more reliable score can decrease the validity of the observed composite as a measure of the target composite. IS - 3 JF - Applied Measurement in Education EP - 240 TI - The Reliability and Validity of Weighted Composite Scores PB - Routledge VL - 17 SP - 221 KW - reliability KW - validity AU - Kane, Michael AU - Case, Susan PY - 2004/// UR - http://dx.doi.org/10.1207/s15324818ame1703_1 ER -