When multiple linear regression is used to develop a prediction model, sample size must be large enough to ensure stable coefficients. If the derivation sample size is inadequate, the model may not predict well for future subjects. The precision efficacy analysis for regression (PEAR) method uses a cross- validity approach to select sample sizes…

Person-fit research in the context of paper-and-pencil tests is reviewed, and some specific problems regarding person fit in the context of computerized adaptive testing (CAT) are discussed. Some new methods are proposed to investigate person fit in a CAT environment. These statistics are based on Statistical Process Control (SPC) theory. A…

Cross-validation, an economical method for assessing whether sample results will generalize, is discussed in this paper. Cross-validation is an invariance technique that uses two subsets of the data sample to derive discriminant function coefficients. The two sets of coefficients are then used with each data subset to derive discriminant function…

A simulation study was conducted to identify the best hot-deck variation to impute missing values. The three variations included in the study were the hot-deck random, the hot-deck sequential, and the hot-deck distance. The properties of these methods were investigated under three levels of the proportion of incomplete records and four levels…

In response to requests for information relating to the emotional maltreatment of children, the Region 6 Child Abuse and Neglect Resource Center produced a videotape depicting a fictional courtroom hearing conducted to determine whether or not a child should be temporarily removed from his parents' custody on the grounds of emotional maltreatment.…

The fourteenth in a series of profiles documenting experiences with the use of instructional technology describes the way an entire course can be shaped around a single game. Projects established to promote and support gaming and sources for more information on the subject are also presented. (Author/MLF)

The author lists the objectives of simulations and briefly mentions the types of games available and how they may be used in the classroom. (AG)

A discussion of the complex interrelationships that impinge upon the community college, and how systems development might assist in the decision-making process. (Author)

When circulation data are used as input parameters for a computer simulation of a library's circulation subsystem, the results of the simulation provide information on book availability and delays. The model may be used to simulate alternative loan policies. (Author/LS)

This study derived an expectation-maximization (EM) algorithm for estimating the parameters of multidimensional item response models. A genetic algorithm (GA) was developed to be used in the maximization step in each EM cycle. The focus of the EM-GA algorithm developed in this paper was on multidimensional items with "mixed structure."…