Mokken scale analysis:Between the Guttman scale and parametric item response theory

This article introduces a model of ordinal unidimensional measurement known as Mokken scale analysis. Mokken scaling is based on principles of Item Response Theory (IRT) that originated in the Guttman scale. I compare the Mokken model with both Classical Test Theory (reliability or factor analysis) and parametric IRT models (especially with the one-parameter logistic model known as the Rasch model). Two nonparametric probabilistic versions of the Mokken model are described: the model of Monotone Homogeneity and the model of Double Monotonicity. I give procedures for dealing with both dichotomous and polytomous data, along with two scale analyses of data from the World Values Study that demonstrate the usefulness of the Mokken model.</p

Taking Advantage of the Circular Structure of Human Values

Schwartz (1992) has shown that Value Domains have a circular structure. The same circular structure has been observed in so many samples all over the world that we may assume that the circular structure is rather universal. Given this structure, the Value systems of individuals can be fruitfully characterized using only one score, which enables us to describe it extremely economically. The Value Circle score we suggest might be independent of response tendencies and cross culturally valid as well. The purpose of this chapter is (a) to show how such a score can be assigned to individuals and (b) to show the advantages and possibilities we have using such a score for analyzing the relation between religiosity and values

Techniques for secondary analysis: Unfolding analysis of "PICK K/N" and "PICK ANY/N" data

Techniques for secondary analysis: Unfolding analysis of "PICK K/N" and "PICK ANY/N" dat