It is widely believed that regression models for binary responses are problematic if we want to compare estimated coefficients from models for different groups or with different explanatory variables. This concern has two forms. The first arises if the binary model is treated as an estimate of a model for an unobserved continuous response and the…

The use of "radar charts" is an increasingly popular way to present spatial data in a visually interesting format. Some authors recommend using "filled radar charts" to compare the performance of observational units. Filled radar charts are not appropriate for such comparisons because the size of the area within the polygon is not invariant to the…

In 1916 Robert Frost published his famous poem, "The Road Not Taken," in which he muses about what might have been had he chosen a different path, made a different choice. While counterfactual arguments in general can often lead to vacuous nowheres, frequently in statistics the data that are not presented actually exist, in a sense,…

Two basic data sources required for research studies have been secondary and primary. Secondary data collection helps the researcher to provide relevant background to the study and are, in most cases, available for retrieval from recorded sources. Primary data collection requires the researcher to venture into the field where the study is to take…

Research within a constructivist approach often relies on interview data, which are used to reveal beliefs held by the interviewee or to expose conceptions or conceptual structures that are supposed to reside within the interviewee. From a sociocultural perspective, severe criticism has been leveled against the neglect of the problems of inferring…

Research results should not be taken at face value; some research is not well designed, and readers must be able to assess whether the research carried out actually supports the results or may be explained otherwise. Research reports are usually divided into introduction or literature review, methods, results, and discussion and conclusions. Basic…

This paper details the challenges encountered by authors summarizing evidence from a primary study to describe a treatment's effectiveness using an effect size (ES) estimate. Dilemmas that are encountered, including how to calculate and interpret the pertinent standardized mean difference ES for results from studies of various research designs,…

Triangulation strategy results in evidence characterized by the following: (1) convergence; (2) inconsistency; and (3) contradiction. In order to render the data sensible, the researcher or evaluator must report data collection procedures, as well as the three levels of information from which explanations of social phenomena are constructed. (BJV)

In response to a frequently articulated call for "ecological" validity from instructional communication investigations, this paper reports on methodological issues which evolved during the development and application of a coding scheme for content analyzing teacher compliance-gaining messages. Starting with a consideration of the…

Professional practice is built on sound knowledge specific to each discipline. This knowledge is developed and validated through a process of scientific investigation or research. However, lack of knowledge about the research process acts as a barrier to applying evidence-based practice within the school setting. Understanding the components that…

Describes three classes of measurement techniques: (1) interviewing methods; (2) record retrieval procedures; and (3) observation methods. Discusses primary reasons for measurement error. Concludes that, although measurement error can be defined and controlled for, there are other design factors that also must be considered. (CFR)

Contends that the high quality of the probability sampling used by the International Association for the Evaluation of Educational Achievement (IEA) is due, in large part, to procedures developed by IEA's first statistical consultant, Gilbert Peaker. Concludes that the Peaker process is a first-class sample design. (CFR)

Highlights some of the fundamental differences between positivistic and qualitative research methods regarding art education. Defends qualitative research and argues that applying natural science research principles to human endeavors is often futile. Discusses the special problems and advantages of qualitative research. (MJP)

Asserts that educational policymakers must measure student achievement and school system performance accurately to help provide skills demanded by society. Contends that many international surveys either fail to provide adequate and precise answers to the intended research questions or provide inaccurate and faulty results. (CFR)

This paper investigated the methodological challenges related to the use of computer-mediated communication (CMC) to investigate the impact of gender identity on student perceptions of university life. This longitudinal research project at the University of Cambridge (England) sought to determine the reasons for the disparity in numbers of…