Proposes random-effects regression model for analysis of clustered data. Suggests model assumes some dependency of within-cluster data. Model adjusts effects for resulting dependency from data clustering. Describes maximum marginal likelihood solution. Discusses available statistical software. Demonstrates model via investigation involving…

Discussion of clustering of documents and queries in information retrieval systems focuses on the use of a genetic algorithm to adapt subject descriptions so that documents become more effective in matching relevant queries. Various types of clustering are explained, and simulation experiments used to test the genetic algorithm are described. (27…

This article presents the results of a survey of elementary teachers (n=22) who used cluster grouping of gifted students within regular classrooms. Findings indicated general acceptance of clustering and that gifted students benefited from this provision. (DB)

Three age groups of 24 people each completed verbal word list tasks and spatial learning tasks 5 times each. Significant age differences were found for total recall and type of task. Younger subjects showed increased levels of clustering--organizing information according to semantic or spatial clusters. Age was not related to temporal order of…

Discussion of researchers in the multidisciplinary field of communications focuses on a study using the Social Sciences Citation Index (SSCI) that investigated cocitation frequencies of selected communication researchers and often-cited researchers in related fields. A factor analysis of correlations based on cocitation frequencies is among the…

Describes electronic clustering, an evaluation strategy that graphically reveals students' higher level thinking skills. (MG)

A study examined the use of cluster grouping in two elementary graduation classes (n=197). During the three program years, students involved in the school using cluster grouping were more likely to be identified as high achieving or above average, and all students had significant increases in achievement test scores. (Author/CR)

The present study investigates the hypothesis that the traditional positive relationship between expertise and item organization during recall depends on the degree of domain-relevance of the criteria used to assess item organization. The hypothesis was tested on a beverage list recall task by comparing experienced waiters, beginner waiters and…

A Monte Carlo study examined the statistical performance of single sample and bootstrap methods that can be used to test and form confidence interval estimates of indirect effects in two cluster randomized experimental designs. The designs were similar in that they featured random assignment of clusters to one of two treatment conditions and…

This paper reports the opinions of urban mathematics teachers concerning five areas of school mathematics: mathematics, mathematics teaching, recommended changes in mathematics education, mathematics education, and schooling. Of the 490 secondary mathematics teachers surveyed, 47 percent were frequent participants in the Urban Mathematics…

Article presented a plan for ninth grade exposure to the career education cluster concept utilized in Monrovia, California. (Editor/RK)

A total of 36 5- and 8-year-old children were tested on cued and noncued recall of a list of 16 words containing either two, four or eight categories. Reported are numbers of words and categories recalled in cued and noncued situations, cluster grouping, age differences and interaction effects. (SDH)

Developing an aesthetic theory of advertising, this paper offers the premise that advertising is a ritual, that it provides cultural roles, and that it reinforces people's perceptions of their common experiences. The paper discusses advertising and advertising art as a process that both draws from and is sustained by general culture while serving…

An analysis of survey responses from a sample of accredited records technicians on competency characteristics for their occupation is presented in this document. (Accredited records technician is one of seventeen occupation groups included in this research.) The competencies are reported in five categories: (1) those competencies selected by the…