A common mistake in analysis of cluster randomized trials is to ignore the effect of clustering and analyze the data as if each treatment group were a simple random sample. This typically leads to an overstatement of the precision of results and anticonservative conclusions about precision and statistical significance of treatment effects. This…

System Dynamics is a well formulated methodology for analyzing the components of a system including cause-effect relationships and their underlying mathematics and logic, time delays, and feedback loops. It began in the business and manufacturing world, but is now affecting education and many other disciplines. Having inspired by successful policy…

Reports on a process which allows active study of mutating the characteristics of a population of organisms. States that the program, written in C, should run on a MS/DOS system with 640K; CGA is required for graphics output. Describes implementation procedures and two examples using the program. (RT)

This paper provides qualitative student-centered research from an online Research Methodology course taught partly within the immersive, 3-D environment of Second Life with fifty-eight graduate psychology students for the purpose of suggesting a constructivist-based instruction model for immersive environments. A qualitative method approach was…

A person fit test based on the Lagrange multiplier test is presented for three item response theory models for polytomous items: the generalized partial credit model, the sequential model, and the graded response model. The test can also be used in the framework of multidimensional ability parameters. It is shown that the Lagrange multiplier…

The underlying statistical models for multiple regression analysis are typically attributed to two types of modeling: fixed and random. The procedures for calculating power and sample size under the fixed regression models are well known. However, the literature on random regression models is limited and has been confined to the case of all…

This paper describes a computer model that simulates experimental outcome data obtained by the manipulation of 13 independent variables reported in studies investigating the group risky shift. The model is intended as a tool for teaching research methods in an undergraduate course in social psychology. (Author)

A model is described to suggest how the visual system may keep track of perceived objects as their images move on the retina. (Author)

INS, the Integrated Network Simulation language, puts simulation modeling into a network framework and automatically performs such programming activities as placing the problem into a next event structure, coding events, collecting statistics, monitoring status, and formatting reports. To do this, INS provides a set of symbols (nodes and branches)…

Models are one of the tools of operation research which may have applications in the library field. This study is an attempt to establish a simple model for administrative purposes in a university library system. Two measures of a university library system were studied: (1) the cost of adding a volume to the collection and (2) the use of the…

It is obvious to any observer that today the social studies is in the process of a revolutionary change. It is axiomatic that one of the universal goals that all these changes are aimed at is to make social studies courses more meaningful and relevant to the life experiences of the student. One of the fastest developing innovations within the…

This report discusses the objectives and progress to date of Project PRIME: Planning Resources in Minnesota Education. These include: (1) testing the CAMPUS model at 3 institutions; (2) training to use the model; (3) developing compatible planning tools; (4) research on program analysis and faculty activities; (5) linking CAMPUS to institutional…

This article examines the affect of misfit on methods to minimize the inaccuracy of the Item Response Theory (IRT). Three of the most commonly used IRT models were fit in this simulation. (RB)

A copy of the program is available from the second author at the Department of Psychology, LSUNO-Lakefront, New Orleans, Louisiana 70122. (Authors/CB)