Conditional process models, including moderated mediation models and mediated moderation models, are widely used in behavioral science research. However, few studies have examined approaches to conduct statistical power analysis for such models and there is also a lack of software packages that provide such power analysis functionalities. In this…

Single case experimental designs are an important research design in behavioral and medical research. Although there are design standards prescribed by the What Works Clearinghouse for single case experimental designs, these standards do not include statistically derived power computations. Recently we derived the equations for computing power for…

As the use of data in courses that incorporate statistical methods has become more prevalent, so has the need for tools for working with such data, including those for data creation and adjustment. While numerous tools exist that support faculty who teach statistical methods, many are focused on data analysis or theoretical concepts, and there…

The success of an application programming interface (API) crucially depends on how well its documentation meets the information needs of software developers. Previous research suggests that these information needs have not been sufficiently understood. This article presents the results of a series of semistructured interviews and a follow-up…

Google is celebrating its 20th anniversary--and the internet has become an inseparable part of the lives of adults, teens, and children. In awareness of the problems and challenges posed by the new world, various software programs have been developed, among them NetSpark (henceforth: the program), which make it possible to block and/or filter…

We have developed and demonstrated the effectiveness of a set of online interactive learning modules to accompany physics courses at first- and second-year university levels. Students access the modules prior to attending lectures to familiarize themselves with content which is then discussed and reaffirmed in class. Student surveys and access…

This study examines how technology is perceived by different stakeholder groups in The Language Flagship programs. We administered questionnaires to three stakeholder groups: 14 directors, 34 instructors, and 100 learners at a variety of institutions with three goals: (a) to investigate what technologies the directors, instructors, and learners…

The purpose of this quantitative correlational study was to examine the relationship, if any, between teacher training and teacher use of a laptop in a one-to-one laptop program. Teachers recorded their training weekly throughout the twelve-week study. Teacher use of laptops was measured through self-reporting in a pretest and posttest design,…

Hierarchical data analyses in different disciplines are reviewed to compare statistical application of the Hierarchical Linear Model software and the Statistical Analysis System (SAS) MIXED procedure. Similar features of the two programs are illustrated through use of the SAS MIXED procedure. (SLD)

The two purposes of this paper are to provide a SAS IML macro that performs loglinear smoothing and to apply this macro to loglinear smoothing problems that have not been extensively discussed in the test-equating literature. The SAS macro is demonstrated on univariate, bivariate, and trivariate smoothing problems. The univariate and bivariate…

This paper describes a personal computer spreadsheet set up to carry out hierarchical log-linear analyses, a type of analysis useful for institutional research into multidimensional frequency tables formed from categorical variables such as faculty rank, student class level, gender, or retention status. The spreadsheet provides a concrete vehicle…

A review of the literature and of currently available computer programs for the use of log-linear models in analysis of qualitative data is presented, and two types of log-linear models and procedures for investigating both types are outlined. (MSE)

A guide to the use of microcomputer statistical analysis packages for loglinear analysis describes the application of one popular package to a straightforward problem and critically surveys features available in four of the leading packages. Survey findings and suggestions for further development are included. (Author/MSE)

This publication acquaints the user with microcomputer statistical packages and offers a method for evaluation based on a set of criteria that can be adapted to the needs of the user. Several popular packages, typical of those available, are reviewed in detail: (1) Abstat, an easy to use command driven package compatible with the IBM PC or the…

Discusses some of the myths surrounding grading on the curve. Provides a simple explanation of such statistical terms as histograms, relative frequency, normal distribution, mean, and standard deviation. Describes how to restructure the curve, including the program listing for a computer program that will assist the teacher. (TW)