A detailed description of five latent structure models of achievement measurement is presented. The first project paper, by David L. McArthur, analyzes the history of mental testing to show how conventional item analysis procedures were developed, and how dissatisfaction with them has led to fragmentation. The range of distinct conceptual and…

Five comparisons were made relative to the quality of estimates of ability parameters and item calibrations obtained from the one-parameter and three-parameter logistic models. The results indicate: (1) The three-parameter model fit the test data better in all cases than did the one-parameter model. For simulation data sets, multi-factor data were…

Item characteristic curve (ICC) theory describes the relationship between the ability of individuals and the probability of their answering a test question correctly; it is useful in estimating test scores, equating the scores of various tests, and scoring responses during adaptive testing. A simulation study of the effectiveness of the following…

To contribute to a more differentiated description of the cognitive status of young disadvantaged children, a comparative study was made of achievement test performance of disadvantaged and middle class groups of children. On the basis of published reading test scores, test data were gathered from nine public schools, four of which were selected…

A method for developing statistically parallel tests based on the analysis of unique item variance was developed. A test population of 907 basic airmen trainees were required to estimate the angle at which an object in a photograph was viewed, selecting from eight possibilities. A FORTRAN program known as VARSEL was used to rank all the test items…

Several alternative indexes of item usefulness were empirically compared. They were: (1) item discrimination based on high and low groups on a postinstructional measure, (2) shift in item difficulty from a pre- to a postinstruction measure, and (3) item discrimination based on pre- and posttest performances. A typical classroom final examination…

The nature of differences in performance on the third revision of the Stanford-Binet Intelligence Scale (Form L-M) was assessed for two independent samples of Black (n=86) and White (n=86) preschoolers matched for parental education, age, and sex. Large differences, favoring White children, were found. Test bias is discussed. (TJH)

Causes of differential item difficulty for blind students taking the braille edition of the Scholastic Aptitude Test's mathematical section were studied. Data for 261 blind students were compared with data for 8,015 non-handicapped students. Results show an association between selected item categories and differential item functioning. (TJH)

This research examined the degree of comparability and sources of incomparability of English and French versions of reading, mathematics, and science tests that were administered as part of a survey of achievement in Canada. The results point to substantial psychometric differences between the 2 language versions. Approximately 18% to 36% of the…

The purpose of this paper is to link empirical Bayes methods with two specific topics in item response theory--item/subtest regression, and testing the goodness of fit of the Rasch model--under the assumptions of local independence and sufficiency. It is shown that item/subtest regression results in empirical Bayes estimates only if the Rasch…

The agreement between item response theory-based and Mantel Haenszel (MH) methods in identifying biased items on tests was studied. Data came from item responses of four spaced samples of 1,000 examinees each--two samples of 1,000 Anglo-American and two samples of 1,000 Native American students taking the New Mexico High School Proficiency…

The psychometric characteristics of the Graduate Record Examinations General Test (GRE-GT) were studied for three handicapped groups. Experimental subjects took the GRE-GT between October 1981 and June 1984; they include: (1) 151 visually-impaired students taking large-type, extended-time administrations; (2) 188 visually-impaired students taking…

Two methods of item selection were used to select sets of 40 items from a 50-item verbal analogies test, and the resulting item sets were compared for relative efficiency. The BICAL program was used to select the 40 items having the best mean square fit to the one parameter logistic (Rasch) model. The LOGIST program was used to select the 40 items…

The present study was designed to examine whether or not traditional procedures concerning item selection and reliability are both applicable and appropriate for criterion-referenced (CR) tests. It was also designed to examine traditional procedures and those designed especially for CR testing in relation to test variance and item homogeneity.…