This review focuses on three outcome domains: staying in school, progressing in school, and completing school. As of September 2008, What Works Clearinghouse (WWC) looked at 84 studies of 22 dropout prevention interventions that qualified for review. Of these, 23 studies of 16 interventions meet WWC evidence standards: 11 without reservations and…

The research indicates that there are many benefits to pre-kindergarten participation which includes positive social and emotional benefits and academic achievement gains (Barnett et al., 2005; Cody, 1993; Neuman, 2007; U.S. Dept. of Health & Human Services, 2010). The purpose of this quantitative study was to examine the effects of the…

This purpose of this research study was to investigate the role of effective principals and how that role relates to the improvement of adolescent reading skills. This research study identified three strategies that were utilized by principals in an effort to develop effective reading skills in adolescent students which are: (1) effective program…

This study sought to determine the degree to which a body of successful supervision attributes actually exists in practice. Specifically, this investigation sought to determine: (1) To what extent are the twelve dimensions of supervisory practice from the 1989 ASCD Study currently being practiced among selected instructional leaders in two…

There are large disparities between the achievements, behaviour and aspirations of children growing up in different neighbourhoods. This has contributed to the view that neighbourhoods can determine individuals' outcomes. Notably, in the long run these effects could lead to larger social inequality and reduce social mobility, which is why they…

The ability to collaborate in a virtual team is a necessary skill set for today's knowledge workers and students to be effective in their work. Past research indicates that knowledge workers and students need to establish a formal process to perform work, develop clear goals and objectives, and facilitate better communication among team members.…

Analyses were conducted to determine whether the two statistical tests of significance are identical. Such demonstrations regarding parallel correlational and analysis of variance procedures have brought further understanding to each of the domains in the past. When a researcher is investigating the relationship between two variables and thinks…

See TM 501 201-2 for related articles. (MLP)

Compares the harmonic mean and Kramer unequal group forms of the Tukey test for various: (a) degrees of disparate group sizes, (b) numbers of groups, and (c) nominal significant levels. (RC)

A nonasymptotic Chi-Square analysis algorithm is presented to investigate r by c contingency tables where small expected cell frequencies render the usual asymptotic analysis inappropriate. A FORTRAN subroutine is provided for analyzing the tables having highly disproportionate or small marginal totals. (Author/GDC)

Since 1994, the American Psychological Association (APA) has advocated the inclusion of effect size indices in reporting research to elucidate the statistical significance of studies based on sample size. In 2001, the fifth edition of the APA "Publication Manual" stressed the importance of including an index of effect size to clarify…

This paper summarizes information leading to the recommendation that statistical significance testing be replaced, or at least accompanied by, the reporting of effect sizes and confidence intervals. It discusses the use of confidence intervals, noting that the recent report of the American Psychological Association Task Force on Statistical…

J. Frass and I. Newman (2000) proposed a hypothesis testing procedure that incorporated the following three key elements: (1) the establishment of a practical significance value; (2) the construction of a non-nil null hypothesis that incorporated the practical significance value; and (3) statistical testing of the non-nil null hypothesis with a…

This paper presents a testing procedure that incorporates three key elements. The first element is the use of non-nil null hypotheses. The second element is the determination of a practically significant level that is incorporated into the corresponding non-nil null hypothesis. The third element is the use of a randomization test to statistically…

The increased interest in reporting effect sizes means that it is necessary to consider what should be included in a primer on effect sizes. A review of papers on effect sizes and commonly repeated statistical analyses suggests that it is important to discuss effect sizes relative to bivariate correlation, t-tests, analysis of variance/covariance,…