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Over the past decade, Mokken scale analysis (MSA) has rapidly grown in popularity among researchers from many different research areas. This tutorial provides researchers with a set of techniques and a procedure for their application, such that the construction of scales that have superior measurement properties is further optimized, taking full advantage of the properties of MSA. First, we define the conceptual context of MSA, discuss the two item response theory (IRT) models that constitute the basis of MSA, and discuss how these models differ from other IRT models. Second, we discuss dos and don'ts for MSA; the don'ts include misunderstandings we have frequently encountered with researchers in our three decades of experience with real-data MSA. Third, we discuss a methodology for MSA on real data that consist of a sample of persons who have provided scores on a set of items that, depending on the composition of the item set, constitute the basis for one or more scales, and we use the methodology to analyse an example real-data set.

@article{sijtsma_tutorial_2017, title = {A tutorial on how to do a {Mokken} scale analysis on your test and questionnaire data}, volume = {70}, issn = {2044-8317}, doi = {10.1111/bmsp.12078}, abstract = {Over the past decade, Mokken scale analysis (MSA) has rapidly grown in popularity among researchers from many different research areas. This tutorial provides researchers with a set of techniques and a procedure for their application, such that the construction of scales that have superior measurement properties is further optimized, taking full advantage of the properties of MSA. First, we define the conceptual context of MSA, discuss the two item response theory (IRT) models that constitute the basis of MSA, and discuss how these models differ from other IRT models. Second, we discuss dos and don'ts for MSA; the don'ts include misunderstandings we have frequently encountered with researchers in our three decades of experience with real-data MSA. Third, we discuss a methodology for MSA on real data that consist of a sample of persons who have provided scores on a set of items that, depending on the composition of the item set, constitute the basis for one or more scales, and we use the methodology to analyse an example real-data set.}, language = {eng}, number = {1}, journal = {The British Journal of Mathematical and Statistical Psychology}, author = {Sijtsma, Klaas and van der Ark, L. Andries}, month = feb, year = {2017}, pmid = {27958642}, note = {ECC: 0000096 }, keywords = {Algorithms, Computer Simulation, Data Interpretation, Statistical, Educational Measurement, Models, Statistical, Mokken scale analysis, Outcome Assessment, Health Care, Psychometrics, Surveys and Questionnaires, automated item selection procedure, item ordering, non-parametric item response theory, ordinal scaling, person ordering, scalability coefficients}, pages = {137--158}, }

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