This article examines the social nature of teachers' conceptions by showing how teachers frame the "mismatch" of students' perceived abilities and the intended school curriculum through conversational category systems. This study compares the conversations of 2 groups of high school mathematics teachers addressing the Mismatch Problem…

Discriminant analysis (DA) is a multivariate technique concerned with either prediction/classification (predictive discriminant analysis) or distinguishing among groups (descriptive discriminant analysis). DA has many potential applications in gifted education research, including investigation of identification procedures in order to obtain…

This paper describes a study, now in progress, of new methods for representing the sampling variability of Mantel-Haenszel differential item functioning (DIF) results, based on the system for categorizing the severity of DIF that is now in place at the Educational Testing Service. The methods, which involve a Bayesian elaboration of procedures…

Studies evaluating hypotheses about sources of differential item functioning (DIF) are classified into two categories: observational studies evaluating operational items and randomized DIF studies evaluating specially constructed items. For observational studies, advice is given for item classification, sample selection, the matching criterion,…

The stability of bias estimates from J. Schueneman's chi-square method, the transformed Delta method, Rasch's one-parameter residual analysis, and the Mantel-Haenszel procedure, were compared across small and large samples for a data set of 30,000 cases. Bias values for 30 samples were estimated for each method, and means and variances of item…

Traditionally, item difficulty has been defined in terms of the performance of examinees. For test development purposes, a more useful concept would be some kind of intrinsic item difficulty, defined in terms of the item's content, context, or characteristics and the task demands set by the item. In this investigation, the measurement literature…

A framework for categorizing constructed-response items was developed in which items were ordered on a continuum from multiple-choice to presentation/performance according to the degree of constraint placed on the examinee's response. Two investigations were carried out to evaluate the validity of this framework. In the first investigation, 27…

This document contains biology labs, demonstrations, and activities that use low budget materials. The goal is to get students involved in the learning process by experiencing biology. Each lab has a teacher preparation section which outlines the purpose of the lab, some basic information, a list of materials , and how to prepare the different…

The aim of this study was to develop a procedure that could be used to appraise the cognitive features of subject (achievement) tests. Cognitive taxonomies and an accompanying coding scheme were developed and applied to the Graduate Record Examinations subject tests in Psychology and Literature in English. The taxonomies were based on the manifest…

Type I error rates of the likelihood ratio test for the detection of differential item functioning (DIF) were investigated using Monte Carlo simulations. The graded response model with five ordered categories was used to generate data sets of a 30-item test for samples of 300 and 1,000 simulated examinees. All DIF comparisons were simulated by…

Explicit representation of relations plays some role in virtually all higher cognitive processes, but relational knowledge has seldom been investigated systematically. This paper considers how relational knowledge is involved in some tasks that have been important to cognitive development, including transitivity, the balance scale, classification…

This report is one of a series of technical reports issued by the United Nations on integration and improvement of social, demographic, and related statistics and indicators. It notes that establishing detailed links between national accounts and balances and social statistics has proven to be unusually complex at the conceptual level. The…

Anthony Biglan (1973) proposed a typology of academic disciplines that identified three dimensions of academics' perceptions of the similarity of fields of scholarship: (1) "hard-soft", (2) "pure-applied", and (3) "life-non-life". Derek Price (1965) suggested that bibliographic data could be used to provide an…

Focusing on slide and photograph collections that document art, architecture, design, and related fields, this book provides a comprehensive guide to more than 500 visual collections in libraries and institutions throughout the United States and Canada. Listings provide complete information about the collections, including the name and title of an…

This sourcebook is intended to provide researchers and users of natural language computer systems with a classification scheme to describe language-related problems associated with such systems. Methods from the disciplines of artificial intelligence (AI), education, linguistics, psychology, anthropology, and psychometrics were applied in an…