NDLI: Investigating psychometric properties and dimensional structure of an educational environment measure (DREEM) using Mokken scale analysis

Content Provider	Springer Nature : BioMed Central
Author	Palmgren, Per J Brodin, Ulf Nilsson, Gunnar H Watson, Roger Stenfors, Terese
Abstract	Background Questionnaires and surveys are used throughout medical education. Nevertheless, measuring psychological attributes such as perceptions of a phenomenon among individuals may be difficult. The aim of this paper is to introduce the basic principles of Mokken scale analysis (MSA) as a method for the analysis of questionnaire data and to empirically apply MSA to a real-data example. Methods MSA provides a set of statistical tools for exploring the relationship between items and latent traits. MSA is a scaling method of item selection algorithms used to partition an array of items into scales. It employs various methods to probe the assumptions of two nonparametric item response theory models: the monotone homogeneity model and the double monotonicity model. The background and theoretical framework underlying MSA are outlined in the paper. MSA for polytomous items was applied to a real-life data example of 222 undergraduate students who had completed a 50-item self-administered inventory measuring the educational environment, the Dundee Ready Educational Measure (DREEM). Results A pragmatic and parsimonious approach to exploring questionnaires and surveys from an item response theory (IRT) perspective is outlined. The use of MSA to explore the psychometric properties of the Swedish version of the DREEM failed to yield strong support for the scalability and dimensional structure of the instrument. Conclusions MSA, a class of simple nonparametric IRT models – for which estimates can be easily obtained and whose fit to data is relatively easily investigated – was introduced, presented, and tested. Our real-data example suggests that the psychometric properties of DREEM are not adequately supported. Thus, the empirical application depicted a potential and feasible approach whereby MSA could be used as a valuable method for exploring the behavior of scaled items in response to varying levels of a latent trait in medical education research.
Related Links	https://bmcmededuc.biomedcentral.com/counter/pdf/10.1186/s12909-018-1334-8.pdf
Ending Page	16
Page Count	16
Starting Page	1
File Format	HTM / HTML
ISSN	14726920
DOI	10.1186/s12909-018-1334-8
Journal	BMC Medical Education
Issue Number	1
Volume Number	18
Language	English
Publisher	BioMed Central
Publisher Date	2018-10-11
Access Restriction	Open
Subject Keyword	Medical Education Theory of Medicine Bioethics Dundee ready educational environment measure Education Educational measurement Item response theory Mokken scaling Psychometrics Undergraduate Validity Theory of Medicine/Bioethics
Content Type	Text
Resource Type	Article
Subject	Education Medicine
Journal Impact Factor	2.7/2023
5-Year Journal Impact Factor	3.4/2023

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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