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Direct linkGrace C. Tetschner; Sachin Nedungadi – Chemistry Education Research and Practice, 2025
Many undergraduate chemistry students hold alternate conceptions related to resonance--an important and fundamental topic of organic chemistry. To help address these alternate conceptions, an organic chemistry instructor could administer the resonance concept inventory (RCI), which is a multiple-choice assessment that was designed to identify…
Descriptors: Scientific Concepts, Concept Formation, Item Response Theory, Scores
Lyniesha Ward; Fridah Rotich; Jeffrey R. Raker; Regis Komperda; Sachin Nedungadi; Maia Popova – Chemistry Education Research and Practice, 2025
This paper describes the design and evaluation of the Organic chemistry Representational Competence Assessment (ORCA). Grounded in Kozma and Russell's representational competence framework, the ORCA measures the learner's ability to "interpret," "translate," and "use" six commonly used representations of molecular…
Descriptors: Organic Chemistry, Science Tests, Test Construction, Student Evaluation
Sachin Nedungadi; Corina E. Brown; Sue Hyeon Paek – Journal of Chemical Education, 2022
The Fundamental Concepts for Organic Reaction Mechanisms Inventory (FC-ORMI) is a concept inventory with most items in a two-tier design in which an answer tier is followed by a reasoning tier. Statistical results provided strong evidence for the validity and reliability of the data obtained using the FC-ORMI. In this study, differential item…
Descriptors: Test Bias, Test Validity, Test Reliability, Gender Differences
