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Abstract Title: Assessment of Scientific Reasoning: A Case in Proportional Reasoning
Abstract: Proportional reasoning is one of six dimensions assessed by the Lawson's classroom test of scientific reasoning. Mastering of proportional manipulations is also a basic requirement for students to do well in STEM areas. Therefore, valid assessment of proportional reasoning is crucial for researchers and teachers to develop and implement effective instructions in all STEM education areas.  There are four questions in the Lawson's test on proportional reasoning, with which multiple validity issues have been observed in large scale applications of the instrument. In this presentation, we will report our research on validating the questions and the development of new questions aimed to address the validity issues of the Lawson's test.

**Supported in part by NIH Award RC1RR028402 and NSF Award DUE-0633473.
Abstract Type: Targeted Poster
Targeted Session: Proportional Reasoning in Physics: What are students thinking? How can we help?

Author/Organizer Information

Primary Contact: Lei Bao
The Ohio State University
and Co-Presenter(s)
Jing Han, The Ohio State University
Kathy Koenig, Wright State University