This paper summarizes much of the available information concerning the reliability and validity of the Tests of General Educational Development (GED Tests). The data suggest that the results are sufficiently reliable for continued use and that the validity evidence generally supports the intended uses of the tests. (Author/LMO)

Two models were identified for criterion-referenced tests, one based on the assumption of a continuous achievement variable and the other assuming a dichotomous or binary variable. Several test characteristics were examined and contrasted for the two models, including the distribution of scores, establishment of a cutting score, test length, item…

A procedure is demonstrated for constructing tables showing, for each score on a commercial reading achievement test, the percentage of real-world materials that the testee is likely to comprehend with at least a criterion level of proficiency, the percentages of students in a local or national sample who can competently comprehend a given…