A method for asessing second language test validity by modifying and applying statistical test bias techniques to the performance of language learners from different native language groups was developed out of concern for internal test bias, both overall and item-related. Valid tests should contain some items testing differential performance…

The comparison of item response theory models for the Test of English as a Foreign Language (TOEFL) was extended to an equating context as simulation trials were used to "equate the test to itself." Equating sample data were generated from administration of identical item sets. Equatings that used procedures based on each model (simple…

It is noted that while language proficiency tests are not an ideal method for predicting student performance, they are commonly used as admission criteria. A methodology for comparing college tests of English as a Second Language (ESL) that are used for program admission is offered. The procedure imposes certain constraints on data collection,…