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Concept and Implementation of a Two-Stage Coding Scheme for the Development of Computer-Based Testing (CBT)-Items in Traditional Test Software

1
Department of Educational Philosophy and Vocational Education, TU Dortmund University, 44227 Dortmund, Germany
2
TOPSIM GmbH, 72070 Tübingen, Germany
*
Author to whom correspondence should be addressed.
J 2019, 2(1), 41-49; https://doi.org/10.3390/j2010004
Received: 14 November 2018 / Revised: 27 December 2018 / Accepted: 16 January 2019 / Published: 18 January 2019
(This article belongs to the Special Issue Feature Papers for J-Multidisciplinary Scientific Journal)
Computer-based testing (CBT) is gaining importance for studies addressing the diagnosis of competencies, because it is possible to simulate authentic action situations and may reduce the effort of analyzing the data. This benefit is most important for the phase of item design. In this phase of assessment construction, the pattern of answers of a sample is used to draw conclusions on the functionality of the items. Currently, there are no standards for the encodement of items which consider the specifications of CBT-instruments. These specifications are, for example, the a posteriori non-variability of the coding, a lack of information when using conventional test scores and the need of standardization of different formats of items. Taking these specifications into consideration, this paper proposes and discusses a two-stage coding systematization for CBT-items. For this, a distinction between item-coding and answer-coding was done. The coding is discussed for single-section and multi-section formats as well as dichotomous and polytomous answer modes. Therefore, this paper is for users of CBT-instruments who want to achieve the optimal information value of their test results with efficient coding. View Full-Text
Keywords: computer-based testing; test construction; item development; encoding; dichotomous/polytomous items computer-based testing; test construction; item development; encoding; dichotomous/polytomous items
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Ketschau, T.J.; Kleinhans, J. Concept and Implementation of a Two-Stage Coding Scheme for the Development of Computer-Based Testing (CBT)-Items in Traditional Test Software. J 2019, 2, 41-49.

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