In many testing programs it is assumed that the context or position in which an item is administered does not have a differential effect on examinee responses to the item. Violations of this assumption may bias item response theory estimates of item and person parameters. This study examines the potentially biasing effects of item position. A…

Test bias detection methods based on item response theory (IRT) are reviewed. Five such methods are commonly used: (1) equality of item parameters; (2) area between item characteristic curves; (3) sums of squares; (4) pseudo-IRT; and (5) one-parameter-IRT. A table compares these and six newer or less tested methods. (SLD)

Differential functioning of males and females on achievement test items was studied in a sample of 110,000 students in kindergarten through grade 12. First, item parameters and ability estimates for these parameters were obtained from LOGIST computer program runs for the entire group. Predicted performance for each item for each group was…

This invitational conference examined some of the problems of measurement and evaluation in the inner city. Both the traditional tools and techniques of measurement in evaluation are being questioned, particularly by ghetto community members. Thus, a need was seen for clearly justifying the existence of testing and research efforts and enlisting…

This paper presents the dual approach to item bias detection employed in the Maryland Functional Testing Program (MFTP). Using instructional objectives mandated by the Maryland State Board of Education, the MFTP develops two levels of the Maryland Functional Reading Test (MFRT) and the Maryland Functional Mathematics Tests (MFMT). These…

The agreement between Mantel-Haenszel and Rasch procedures for identifying differential item functioning (DIF) on teacher certification tests was studied. Two specific research questions were addressed: (1) whether the Mantel-Haenszel and Rasch procedures identify the same items as functioning differently; and (2) how consistently each method…

Four problems faced by the staff of the California Assessment Program (CAP) were solved by applying Rasch scaling techniques: (1) item cultural bias in the Entry Level Test (ELT) given to all first grade pupils; (2) nonlinear regression analysis of the third grade Reading Test scores; (3) comparison of school growth from grades two to three, using…

The relationship between item omission and item position on criterion-referenced tests in the Texas state assessment program is examined. Item statistics from the Texas Educational Assessment of Minimum Skills (TEAMS) and Texas Assessment of Basic Skills (TABS) mathematics and reading tests from 1983 through 1985 are examined for three ethnic…