The accuracy with which regression models estimate treatment effects is dependent upon a number of conditions. The stability of the regression line (a function of sample size and correlation between pretest and posttest) is said to be the most important of these conditions. The utility of regression models is proportional to the size of the…

This report describes the development of a criterion-referenced proficiency examination for dental auxiliaries that consists of both written and performance tests in each of five areas: chairside assisting, patient education, diagnostic aids, therapeutics, and laboratory procedures. The content outlines of the tests are presented. The formation of…

The feasibility of pre-equating, or establishing conversions from raw to scaled scores through the use of pretest data before operationally administering a test, was investigated for the Scholastic Aptitude Test (SAT). Item-response theory based equating methods were used to estimate item parameters on SAT pretest data, instead of using final form…