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What is Item Difficulty

Chapter 16
Handbook of Research on Driving STEM Learning With Educational Technologies
Item trait given by the amount of students who are capable of answering the item correctly, and relates to the complexity of the question.
Published in Chapter:
Accurate Items for Inaccurate Conceptions in Undergraduate Physics Students
Eder Hernandez (Tecnologico de Monterrey, Mexico) and Genaro Zavala (Tecnologico de Monterrey, Mexico & Universidad Andres Bello, Chile)
Copyright: © 2017 |Pages: 27
DOI: 10.4018/978-1-5225-2026-9.ch016
Abstract
Generating a concept inventory for a specific student sample is a task that, if completed successfully, could help the instructor have a better approach to what students think at the time they are taking a test. This allows the instructor to observe which concepts the students are struggling with the most, and make the necessary adjustments for that current group, or for future ones. This investigation aims to analyze and classify the electrostatic items of the Conceptual Survey of Electricity and Magnetism (CSEM) in order to decide which items are useful and which ought to be modified. By performing a psychometric analysis on each of these items, mostly based on the Item Response Curve's (IRC) graphs' evaluation, this study will target and determine the items that fit the best for the students enrolled in the Electricity and Magnetism undergraduate course at a private university in the north of Mexico.
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