The Rasch model was used to compare the grade equivalent scores which students of equal ability would have obtained, had they taken different levels of the Iowa Tests of Basic Skills (ITBS). Raw scores on items common to levels 9-14 of the ITBS (vocabulary subtest) were obtained from 6,000 students in Dallas, Texas. Rasch scales were used to…

Since grade-appropriate levels of standardized achievement tests must frequently be used in Elementary and Secondary Education Act Title I evaluations, there may be large discrepancies between test difficulty and the achievement level of those being tested, with resultant inaccuracies in the scores. Procedures based on the Rasch scaling model were…

To what degree testing can become adaptive is considered in three ways: from a formal methodological perspective; from a human process, stability, perspective; and from a sub-system or component view within an adaptive instructional system (AIS). With the advent of large computer-based training systems, the opportunity to broadly implement…