Introductory physics lab instruction is undergoing a transformation, with increasing emphasis on developing experimentation and critical thinking skills. These changes present a need for standardized assessment instruments to determine the degree to which students develop these skills through instructional labs. In this article, we present the…

"Scientific argumentation," defined as the ability to develop and analyze scientific claims, support claims with evidence from investigations of the natural world, and explain and evaluate the reasoning that connects the evidence to the claim, is a critical component of current science standards and is consistent with "Common Core…