Concern has been expressed over the item response theory (IRT) assumption that a person's ability can be estimated in a unidimensional latent space. To examine whether or not the response to an item requires only a single latent ability, unidimensional ability estimates were compared for data generated from the multidimensional item response…

Many applications of educational testing have a missing data aspect (MDA). This MDA is perhaps most pronounced in item banking, where each examinee responds to a different subtest of items from a large item pool and where both person and item parameter estimates are needed. The Rasch model is emphasized, and its non-parametric counterpart (the…

Two of the standards contained in the third draft of the new Joint Technical Standards for Test Development and Revision are discussed: Standard 3.13, mandating the use of multicultural material and the avoidance of material offensive to any major ethnic, cultural, or gender group; and Standard 3.14, mandating research and subsequent test revision…

The distribution of a certain item response theory (IRT) based person fit index to identify systematic types of aberrance is discussed. For the Rasch model, it is proved that: (1) the joint distribution of subtest-residuals (the components of the index) is asymptotically multivariate normal; and (2) the distribution of the index is asymptotically…

Methods and indices based on item response theory (IRT) for detecting and diagnosing aberrant response patterns are reviewed. These indices are divided into three groups: (1) residuals-based; (2) likelihood-based; and (3) ratio of covariances-based (extended cautions). For each index, the determination of its sampling distribution as well as its…

This brief overview notes that an adaptive test differs from standardized achievement tests in that it does not consist of a certain set of items that are administered to a group of examinees. Instead, the test is individualized for each examinee. The items administered to the examinee are selected from a large pool of items on the basis of the…

This paper attempts to provide some initial information about the use of a variety of item response theory (IRT) models in the item selection process; its purpose is to compare the information curves derived from the selection of items characterized by several different IRT models and their associated parameter estimation programs. These…

This document consists of test items which are applicable to biology courses throughout Australia (irrespective of course materials used); assess key concepts within course statement (for both core and optional studies); assess a wide range of cognitive processes; and are relevant to current biological concepts. These items are arranged under…

Several formats for testing English style are described and discussed. The questions are taken from eight versions of the Cologne placement test for beginning university students and a test battery designed for the German Academic Exchange Service. The first two formats are a multiple choice question and a paragraph with underlined words and…

The sample test items included in this document are intended as a resource for teachers of Marketing and Distributive Education programs with emphasis on hospitality and recreation marketing, and tourism and travel services marketing. The related curriculum material has been published in the Travel and Tourism syllabus, an advanced-level module in…

This presentation compares the results of a reanalysis of items in one form of a level of the 1978 SRA Achievement Series with the results from the pretest analysis. The bias analyses were performed on white or majority, black, Hispanic, male, and female samples from the pretest and two subsequent samples. Comparisons were made in terms of the…

One of the recurrent themes of the psychometric literature has been the idea that the incorrect responses a person makes to test items contain information that might be useful in determining the person's position on the variable the items are intended to define. The "Partial Credit" model, a member of the family of latent trait models…

Features of a probabilistic testing system that has been implemented on the "cerl" PLATO computer system are described. The key feature of the system is the manner in which an examinee responds to each test item; the examinee distributes probabilities among the alternatives of each item by positioning a small square on or within an…

A method of investigating for possible bias in test items is proposed that uses analysis of variance for item data based on groups that have been selected to have identical test score distributions. The item data used are arcsin transformations of item difficulties. The methodological procedure has the following advantages: (1) The arcsin…

Traditionally, comparable content-area forms and levels of a multi-level, multi-form achievement test series have been equated using the equipercentile method. There is some evidence to indicate, however, that better procedures are needed. A linking procedure is being used to equate simultaneously 40 different test forms of an achievement test:…