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 …

Item response theory (IRT) has its origins in pioneering work by Louis Thurstone in the
1920s, a handful of authors such as Lawley, Mosier, and Richardson in the 1940s, and more …

Mokken (1971) developed a scaling procedure for both dichotomous and polytomous items
that was later coined Mokken scale analysis (MSA). MSA has been developed ever since …

Background Mokken scaling techniques are a useful tool for researchers who wish to
construct unidimensional tests or use questionnaires that comprise multiple binary or …

We examined the construct validity and reliability of the previously developed Psychological
and Social modules of the Portuguese Physical Literacy Assessment Questionnaire (PPLA …

To assess the public health impact of the COVID-19 pandemic on mental health,
investigators from the National Institutes of Health Environmental influences on Child Health …

This article discusses the concept of an invariant item ordering (IIO) for polytomously scored
items and proposes methods for investigating an IIO in real test data. Method manifest IIO is …

Despite the overwhelming use of tests and questionnaires, the psychometric models for
constructing these instruments are often poorly understood, leading to suboptimal …

Mokken scale analysis (MSA) is a probabilistic‐nonparametric approach to item response
theory (IRT) that can be used to evaluate fundamental measurement properties with less …

Abstract The Dark Triad (DT: Machiavellianism, narcissism, and subclinical psychopathy)
have often been measured using a 12-item scale: The 'Dirty Dozen'. Many articles report …