A strategy is proposed for conceptualizing moderating relationships based on their type (strictly correlational and classically correlational) and form, whether continuous, noncontinuous, logistic, or quantum. Results of computer simulations comparing three statistical approaches for assessing moderator variables are presented, and advantages of…

A key strength of latent curve analysis (LCA) is the ability to model individual variability in rates of change as a function of 1 or more explanatory variables. The measurement of time plays a critical role because the explanatory variables multiplicatively interact with time in the prediction of the repeated measures. However, this interaction…

Should one be more confident when predicting the whole (or an event based on a larger sample) from the part (or an event based on a smaller sample) than when predicting the reverse? The relevant literature on judgment under uncertainty argues that such predictions are symmetrical but that, as an empirical matter, people often fail to appreciate…

Four experiments tested the predictions made by the model outlined in A. H. Criss and R. M. Shiffrin (2004b). Participants studied 2 successive lists of pairs followed by a recognition memory test for the most recent list. Some items and some pairs were repeated across the 2 lists. Critically, a given item could be repeated in the same or…

All first-year students who entered the University of Missouri-Columbia as animal science majors between the fall of 1998 and 2004 (n = 619) had the opportunity to participate in a residentially-based Freshmen Interest Group (FIG) and/or a learning community specifically designed for them. The odds of graduating is significant for all three…

The underlying aim of the work related in this article, was to define Design Patterns for recording and analyzing usage in learning systems. The implied "bottom-up" approach when defining a Design Pattern brought us to examine data collected in our learning system through different lights: (1) the data type, (2) the human roles involved…

This study explores factors that predict learner satisfaction and transfer of learning in an online educational program at a multinational corporation, established to improve organizational learning by providing training in technical skills. A mixed-methods design was used, selecting both quantitative methods (utilizing survey research) and…

Bayesian methods for estimating dose response curves in quantal bioassay are studied. A linearized multi-stage model is assumed for the shape of the curves. A Gibbs sampling approach with data augmentation is employed to compute the Bayes estimates. In addition, estimation of the "relative additional risk" and the "risk specific…

Various classical approaches to evaluating test bias are reviewed, and their conceptual underpinnings are discussed. Bias is examined as it relates to predictive validity, rather than construct validity. One of the first test bias models was developed by T. A. Cleary (1968). Cleary's work with test bias and regression stimulated others to develop…

This paper describes a procedure for smoothing the proportions of a double-entry expectancy table which might be used in higher education admissions advising or other functions. The product of the smoothing procedure is a nomograph, a medium for displaying expectancies which provides pairs of individual values for two predictor variables rather…

Research results concerning determinants of organizational effectiveness of colleges are presented, and concerns pertaining to this type of research are addressed. A major research question is whether the study of institutional effectiveness can identify indicators of long-term organizational viability. In 1980, organizational effectiveness was…

Based on sample data representing five years of monthly circulation totals from 50 academic libraries in Illinois, Iowa, Michigan, Minnesota, Missouri, and Ohio, a study was conducted to determine the most efficient smoothing forecasting methods for academic libraries. Smoothing forecasting methods were chosen because they have been characterized…

The Wechsler Adult Intelligence Scale was administered to 30 male criminally insane patients and 15 violent convicts. The latter had similar subtest score configurations and the mean similarities ratio score for the violent group was significantly lower than that of the nonviolent group. (Author/SE)

This study examines the Rotter Internal-External locus of control Scale to determine if it differentiates people according to the degree of control they feel they have over behavior. The results support Rotter's claim that reinforcement value has to be taken into consideration in Locus of Control studies. (EJT)

IQ tests were viewed solely as predictors in this investigation. The results revealed equal but very low within-ethnic-group correlations between IQ and achievement measures administered concurrently prior to desegregation and for tests administered one and two years following desegregation. (Author)