Scholars increasingly rely on indirect questioning techniques to reduce social desirability bias and item nonresponse for sensitive survey questions. The major drawback of these approaches, however, is their inefficiency relative to direct questioning. We show how to improve the statistical analysis of the list experiment, randomized response…

This dissertation is aimed at investigating the impact of missing data and evaluating the performance of five selected methods for handling missing responses in the implementation of Cognitive Diagnostic Models (CDMs). The five methods are: a) treating missing data as incorrect (IN), b) person mean imputation (PM), c) two-way imputation (TW), d)…

Accurate census data is essential for a variety of government planning functions and plays an important methodological role in social science. This article responds to issues raised by Alice Sullivan concerning how the UK 2021 census will ask about sex and gender. The two-centuries-old question about male/female sex is not ideal, even with the new…

This paper presents three different ways of computing the internal consistency coefficient alpha for a same set of data. The main objective of the paper is the illustration of a method for maximizing coefficient alpha. The maximization of alpha can be achieved with the aid of a principal component analysis. The relation between alpha max. and the…

The connection between item bias and test scores was investigated using a simulation approach. Two samples of hypothetical examinees were simulated using an item response theory model. The two samples were identical, except that the mean theta value 1 sample was 5 less than the other. The simulated tests consisted of 50 items with characteristics…

In this article, a new method is presented and implemented for deriving a scale of socioeconomic status (SES) from international survey data using a multilevel Bayesian item response theory (IRT) model. The proposed model incorporates both international anchor items and nation-specific items and is able to (a) produce student family SES scores…

The general goal of this paper is to help researchers conduct appropriately designed goodness of fit studies for item response model applications. The specific purposes are to describe: (1) an up-to-date set of promising and useful methods for addressing a variety of goodness of fit questions; and (2) current research studies to advance this set…

An attempt to adapt the U.S.-based IDEA (Instructional Development by Evaluation and Assessment) system to Great Britain is described. This widely-used method of faculty evaluation based on student ratings was pioneered by Kansas State University. Among the features of IDEA are the following: it relates student perceptions of teacher behavior to…

Research efforts have established that the Mantel-Haenszel procedure (MHP) is an effective method for detecting the presence of test items exhibiting differential item functioning (DIF). While the MHP has been advocated for situations where item response theory based methods may not be usable, recent findings have suggested that the performance of…