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Proficiency with calculating, reporting, and understanding measurementuncertainty is a nationally recognized learning outcome for undergraduatephysics lab courses. The Physics Measurement Questionnaire (PMQ) is aresearch-based assessment tool that measures such understanding. The PMQ wasdesigned to characterize student reasoning into point or set paradigms, wherethe set paradigm is more aligned with expert reasoning. We analyzed over 500student open-ended responses collected at the beginning and the end of atraditional introductory lab course at the University of Colorado Boulder. Wediscuss changes in students' understanding over a semester by analyzingpre-post shifts in student responses regarding data collection, data analysis,and data comparison.

Student reasoning about measurement uncertainty in an introductory lab course