Evolutionary trees are central to learning about evolutionary processes, yet students at all educational levels struggle to read and interpret them. The synthetic tree-reading model (STREAM), based on published and not yet empirically tested models, was tested to determine whether the assumed hierarchy of the model could be substantiated and how…

Scientific reasoning competencies are highlighted in science education policy papers and standard documents in various countries around the world and pre-service science teachers are asked to develop them during teacher training as part of their professional competencies. In order to monitor the development of pre-service science teachers'…

Reasoning skills have been clearly related to achievement in introductory undergraduate biology, a course with a high failure rate that may contribute to dropout from undergraduate STEM majors. Existing measures are focused on the experimental method, such as generating hypotheses, choosing a research method, how to control variables other than…

This article considers the design process for new formative history assessments. Over the course of 3 years, my colleagues from the Stanford History Education Group and I designed, piloted, and revised dozens of "History Assessments of Thinking" (HATs). As we created HATs, we sought to gather information about their cognitive validity,…

The important but little understood problem that motivated this study was the lack of research on valid assessment methods to determine progress in higher-order learning in situations involving complex and ill-structured problems. Without a valid assessment method, little progress can occur in instructional design research with regard to designing…

Developing a cognitive model of task performance is an important and often overlooked phase in assessment design; failing to establish such a model can threaten the validity of the inferences made from the scores produced by an assessment (e.g., Leighton, 2004). Conducting think aloud interviews (TAIs), where students think aloud while completing…

Many current efforts to develop large-scale science assessments involve hands-on tasks because of their presumed power to elicit and measure scientific reasoning skills. An analysis of the processes in which students engage while responding to such assessment is needed in order to discover the specific forms of reasoning that tasks elicit. This…