Bytheway discusses the problems of representation and sampling methodology found in the Three Generation Family Study directed by Hill at the University of Minnesota. Hill responds to this criticism and challenges Bytheway to provide a better sampling design. (Author/HLM)

A program is presented for the control of biological hazards in research centers, to ensure that all investigative activities are conducted in a manner that presents the least possible hazard to employees, students, and the community. (MB)

Comments on a journal article that suggests that educational statistics may be compared even in cases where different experimental units are used in the analyses. (MLH)

Reviews elementary and secondary school leadership developments for the decade preceding Britain's 1988 Education Reform Act and during the 1990s. Summarizes major themes, including headteachers' central importance, shared leadership issues, the changing character of heads' professional and entrepreneurial leadership, heads' change-agent role,…

Examines potential problems in the use of inferential statistics for single population proportions, differences between two population proportions, and quotients of two population proportions. Discusses hypothesis testing versus interval estimation. Emphasizes the importance of selecting the appropriate formula for the standard error and…

Educational researchers and policymakers need to understand the ecological correlation fallacy, since so much bad research (and policy) has been based on it. Aggregate data may or may not yield results that are true for individuals. Only individual-level data can correctly answer questions about the relationship between variables for individuals.…

Conclusive research has shown the benefits of small class size (1:15), especially for primary grades. Large-scale projects in Indiana and Tennessee and numerous smaller studies found that youngsters in small classes obtain higher test scores, participate more eagerly, demonstrate improved behavior, and retain these benefits in later schooling…

Asserts that this book, drawn from a 1993 conference on memory development, accurately reflects the contemporary status of the field in two ways: (1) its research is matured and specialized; and (2) there are no major theoretical disputes, nor a widely shared new approach, although using microgenetic designs to study cognitive strategy choice…

Traces through Thomas Greenfield's work his use of Max Weber's interpretive social analysis, including Weber's view of the individual unit of analysis, value topologies, comparative history methods, and analytical ideal topologies. Compares Greenfield's and Weber's metaphysical assumptions, ontological perspectives, and epistemological frameworks.…

Results from numerous school- and teacher-effectiveness studies suggest that variation between classes is more significant than variation between schools, though evidence often seems contradictory. This article considers why different studies generate different findings, identifies key study design issues, and relates these observations to…

Provides three responses regarding an article, "Choosing Our Futures": (1) disagrees with how much and how fast change in academic libraries should be made, arguing that reorientation not revolution is needed; (2) sees it as a foundation for dialog and action; and (3) notes the article's lack of supporting research, questions its vague…

Proposes an approach to defining units of analysis for Internet communication research. Defines the term "Internet computer-mediated communication." Uses this definition as the basis for developing a set of definitions (media space, media class, media object, and media instance) as units of analysis. Illustrates these units with some examples. (SR)

This article reviews and critiques the research on possible genetic factors in stuttering. The failure to consider epidemiologic factors is thought to have biased previous research, but recent data provide evidence that spontaneous recovery and chronicity are influenced by genetic factors. Findings support previous conclusions about combined…

Views intercoder reliability as a sampling problem for content analyses. Develops a formula for generating sample sizes needed to have valid reliability estimates. Suggests steps for reporting reliability. (TB)

Argues that the key distinction of a situated approach to studying intelligent behavior is not the method used but the focus of the investigation, specifically the unit of analysis. Discusses contemporary approaches to assessment, collaborative problem solving as an assessment context, situated assessment, intentional dynamics, and interaction as…