Factor analysis has historically been used for myriad purposes in the social and behavioral sciences, but an especially important application of this technique has been to evaluate construct validity. Since in the present milieu both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) are readily available to the researcher,…

Stepwise methods are frequently employed in educational and psychological research, both to select useful subsets of variables and to evaluate the order of importance of variables. Three problems with stepwise applications are explored in some detail. First, computer packages use incorrect degrees of freedom in their stepwise computations,…

Research on the evaluation of World Wide Web sites has already begun, but it is proceeding at a slow rate. The main reasons for this are the attempt to adapt existing methodologies to the particularities of the Web, the individual structure of Webs sites, and the issue of finding the appropriate evaluators. This study addresses these points and…

When museum professionals speak of evaluating a web site, they primarily mean formative evaluation, and by that they primarily mean testing the usability of the site. In the for-profit world, usability testing is a multi-million dollar industry, while non-profits often rely on far too few dollars to do too much. Hence, heuristic evaluation is one…

A Monte Carlo study evaluated the effectiveness of different factor analysis extraction and rotation methods for identifying the known population multiple-indicator measurement model. Results demonstrate that exploratory factor analysis can contribute to a useful heuristic strategy for model specification prior to cross-validation with…

Explains the use of genetic algorithms to combine results from multiple query evaluations to improve relevance in information retrieval. Discusses niching techniques, relevance feedback techniques, and evolution heuristics, and compares retrieval results obtained by both genetic multiple query evaluation and classical single query evaluation…

Suggests ways to increase precision when searching full text files on BRS, Mead Data Central and DIALOG. All of the techniques are based on achieving repetition of central concepts as expressed in natural language. Schematic representations of strategies and sample searches on each of the three systems are provided. (10 references) (CLB)

Outlines an explicit research agenda to address the development of expert systems for reference services. The discussion specifically addresses system testing, describes what has been done, evaluates existing systems, identifies work in progress, and raises seven critical questions in this area. (58 references) (Author/CLB)

Presents 2 complementary techniques for promoting success in computer-based exploration environments for arithmetic instruction. Semantic constraints are explained, heuristic guidance is discussed, use of the techniques for subtraction instruction is described, and field testing with students in grades 1-3 is briefly discussed. (25 references)…

Proposes that, if classroom teaching is defined as an aesthetic medium, a lesson can be evaluated alternatively as a kinetic performance, a message, or a work of art. Cites applications from research studies of athletics, film and television, and art. Suggests that such an approach could be used to examine the ability of low-achieving students.…

Describes SCISOR (System for Conceptual Information Summarization, Organization and Retrieval), a prototype intelligent information retrieval system that extracts useful information from large bodies of text. It overcomes limitations of linguistic coverage by applying a text processing strategy that is tolerant of unknown words and gaps in…

Examines whether problem solving, decision making, and other thinking skills depend more on deep expertise in a specialty or on reflective awareness and general strategies. General and specialized knowledge function in close partnership. The partnership's nature and implications for educational practice are explored. (Author/BJV)

Suggests metaphor is a linguistic tool for discovering meaning and a fundamental form of understanding. Recommends instructing students to produce and analyze extended metaphors by composing biographical portraits. (MS)

Compares factors required for a successful distance education course to requirements for designing a unit of instruction using instructional systems design (ISD). Application of these requirements to video teletraining is discussed to demonstrate that teaching ISD may be accomplished by teaching preservice teachers how to design a distance…

Presents a classification system for developmental psychology that was constructed by means of a survey of articles published in the journals "Child Development" and "Developmental Psychology" in 1969 and 1987. The survey found that eight empirical questions encompassed the full range of empirical interests expressed by…