ERIC Number: EJ1083350
Record Type: Journal
Publication Date: 2015
Abstractor: As Provided
Validation and Analysis of the Coupled Multiple Response Colorado Upper-Division Electrostatics Diagnostic
Wilcox, Bethany R.; Pollock, Steven J.
Physical Review Special Topics - Physics Education Research, v11 n2 p020130-1-020130-8 Jul-Dec 2015
Standardized conceptual assessment represents a widely used tool for educational researchers interested in student learning within the standard undergraduate physics curriculum. For example, these assessments are often used to measure student learning across educational contexts and instructional strategies. However, to support the large-scale implementation often required for cross-institutional testing, it is necessary for these instruments to have question formats that facilitate easy grading. Previously, we created a multiple-response version of an existing, validated, upper-division electrostatics diagnostic with the goal of increasing the instrument's potential for large-scale implementation. Here, we report on the validity and reliability of this new version as an independent instrument. These findings establish the validity of the multiple-response version as measured by multiple test statistics including item difficulty, item discrimination, and internal consistency. Moreover, we demonstrate that the majority of student responses to the new version are internally consistent even when they are incorrect and provide an example of how the new format can be used to gain insight into student difficulties with specific content in electrostatics.
Descriptors: Science Instruction, Scientific Concepts, College Science, Physics, Student Evaluation, Evaluation Methods, Science Tests, Test Validity, Test Reliability, Responses, Pretests Posttests, Test Items, Difficulty Level, Multiple Choice Tests, Scores, Undergraduate Students
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Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Sponsor: National Science Foundation (NSF)
Authoring Institution: N/A
Identifiers - Location: Colorado
Grant or Contract Numbers: DUE1023028; DGE1144083