This study examined the percentage of task-sampling variability in performance assessment via a meta-analysis. In total, 50 studies containing 130 independent data sets were analyzed. Overall results indicate that the percentage of variance for (a) differential difficulty of task was roughly 12% and (b) examinee's differential performance of the…

The main purpose of this research is 1) to establish a framework for the test development and the constructs of writing performance test, 2) to implement a developed writing performance assessment, and 3) to examine the degree of reliability and validity of the assessment tasks and rating scales. Construct-based processing approach to testing…

Performance assessments have become the norm for evaluating language learners' writing abilities in international examinations of English proficiency. Two aspects of these assessments are usually systematically varied: test takers respond to different prompts, and their responses are read by different raters. This raises the possibility of undue…

This article presents a model of formative task-based language assessment implemented in the Chinese language program at the University of Iowa. The model was conceptualized from both empirical evidence, namely previous research done by other team members and me, and assessment theory, namely task-based learning and testing. Our formative…