Designing and verifying a tool for diagnosing multidimensional scientific misconceptions in genetics topic

Sasithorn Kantahan, Putcharee Junpeng, Sompong Punturat, Keow Ngang Tang, Mark Wilson


The main purpose of this study was to design and verify the quality of an assessment tool to diagnose multidimensional scientific misconceptions in the genetic topic of tenth-grade students. A total of 200 samples with three different levels of learning ability from schools under the administration of the Office of Secondary Educational Service 31, Nakhon Ratchasima province participated as test-takers. The design-based research consisting of four phases, namely construct maps, item design, outcome space, and Wright map was employed. Multidimensional Random Coefficient Multinomial Logit was used to verify the quality of the assessment tool. The assessment tool consists of two dimensions, namely, knowledge and reasoning with their respective five and four levels. It is comprised of 40 items encompassing 20 items for each dimension. The results revealed that there is internal structure evidence of validity based on the comparison of model fit and Wright map. Moreover, results also indicated that the reliability evidence and item fit are compliance with the quality of the assessment tool as reflected in the analysis of standard error of measurement and infit and outfit of the items.  It can be concluded that the assessment tool is currently prevalent to diagnose scientific misconceptions in the genetic topics.


Assessment tool; Construct modeling; Genetic topic; Multidimensional model; Scientific misconceptions


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