Operationalization of Bachman's model via a multimodal reading comprehension test: Screening test method facets and testees' characteristics

Test performance is a function both of the test takers' personal attributes and of the test method facets. However, much of the previous research has addressed the covariates of assessment preferences of pupils rather than those of their actual performances. Following the microsystem perspective and as part of a larger project, this study was set out to detect the learner factors and linguistic parameters which mediate performance on different test formats. A number of language learners responded to the group embedded figures test, willingness to communicate scale, Michigan proficiency test, and a reading comprehension test battery. Based on the previous empirical research, a hypothetical model was designed and tested using structural equation modeling. The findings were as follows: (a) Performance on controlled and constructed response tests is substantially mediated by testees' characteristics (cognitive source); (b) Target ability (linguistic source) is the most significant determinant of performance on free-response tasks.