The author of this commentary argues that physical scientists are attempting to advance knowledge in the so-called hard sciences, whereas education researchers are laboring to increase knowledge and understanding in an "extremely hard" but softer domain. Drawing on the work of Popper and Dewey, this commentary highlights the relative…

In this commentary, the author argues that there is a considerable degree of similarity between research in the hard sciences and education and that this provides a useful lens for thinking about what constitutes "rigorous" and "scientific" education research. He suggests that the fundamental property of hard science research…

Latent variable structural equation modeling has become the analytic method of choice in many domains of research in psychology and allied social sciences. One important aspect of a latent variable model concerns the relations hypothesized to hold between latent variables and their indicators. The most common specification of structural equation…

In large measure the authors agree with Tobias and Fletcher's (2012) comments stating that clearer operational definitions of game features are needed to enable research on games and learning. The authors cannot accept that games are a subset of simulations, preferring to identify instances when games and simulations overlap and when they do not.…

In this article, the author talks about "Developing Early Literacy," the report of the National Early Literacy Panel. The panel, which consisted of nine experts, was convened by the National Institute for Literacy to synthesize the research on the development of literacy from birth through age 5. Over the eight years of their work, only 190…

One goal of basic research in education is to identify the variables of effective instruction. As this pursuit has been conceived, however, its theoretical problems make it unlikely that the effort will provide a clear picture of instructional variables, their interactions, or the kind of teacher training that is implied by instructional variables.

The authors express their concerns about the research methodology and assumptions in Coker, Medley, and Soar's work on competency-based teacher education. (WD)

The concept of treatment integrity cuts across a diversity of fields involved with providing treatments or interventions to individuals. In medical treatments, the concept of "treatment compliance" or "treatment adherence" is an important and problematic issue. In the field of nutrition, the concept of "dietary adherence" is important for…

This article responds to Wineburg's critique of the "Pygmalion" study focusing on the self-fulfilling prophesy. The validity and tenability of the hypothesis are examined in relation to well-known critiques. The conclusion is that there is such a phenomenon and that it is quite applicable to teachers' expectations of students. (VM)

This article finds the empirical review of the intellectual effects of family factors by Lala Carr Steelman wanting because (1) it is selective and incomplete; (2) it ignores systematic aggregate effects; (3) it imposes linear analysis on nonmonotone relationships; and (4) it disregards most of the confounds identified by Steelman as crucial.…

The author responds to criticism by R. B. Zajonc on a review of the extant literature on the intellectual consequences of sibship size and birth order. (Author/LMO)

Increased pressure is facing many administrators today for teachers to assign more homework to students. Recent research is reviewed that correlates homework positively with student achievement, and the need for a homework policy in school districts is emphasized. (TE)

The authors state that multiple regression is a powerful method of statistical analysis, provides a strength of relationship index, and should replace analysis of variance (ANOVA) in educational research. They also discuss the coding of categorical variables and available computer programs for multiple regression. (Author/MH)

Critiques Klingele and Warrick's (1990) use of stepswise regression to understand the effect of independent variables on measures of student achievement, and challenges the assertion in Penny and Bond's (1991) reply that ethnicity should not be included in models of achievement. (SM)

There is not much evidence that supports the notion of the self-fulfilling prophecy as applied to teachers' expectations of students. The "Pygmalion" study is often cited by courts and in the media; but it is highly criticized in scholarly circles, and its findings could not be replicated. (VM)