The development and evaluation of valid assessments of scientific reasoning are an integral part of research in science education. In the present study, we used the linear logistic test model (LLTM) to analyze how item features related to text complexity and the presence of visual representations influence the overall item difficulty of an…

This article provides renewed converging empirical evidence for the hypothesis that asking test-takers to respond to text passages with multiple-choice questions induces response processes that are strikingly different from those that respondents would draw on when reading in non-testing contexts. Moreover, the article shows that the construct of…