Analyzed the relations between two continuous response models intended for typical response items: the linear congeneric model and Samejima's continuous response model (CRM). Illustrated the relations described using an empirical example and assessed the relations through a simulation study. (SLD)

Proposed a maximum likelihood procedure for combining the standardized mean differences based on a noncentral-t-distribution and developed an EM algorithm. Simulation results favor the proposed procedure over the existing normal theory maximum likelihood procedure and the commonly used generalized least squares procedure. (SLD)

Investigated the effect of item parameter drift on ability estimates under item response theory, simulating item response data for two testing occasions for the two-parameter logistic model under several crossed conditions. Results show that item parameter drift under the simulated conditions had a small effect on ability estimates. (SLD)

Examined 20 goodness-of-fit indexes based on the minimum fit function using a simulation under the 2-group situation. Results support the use of the delta comparative fit index, delta Gamma hat, and delta McDonald's Noncentrality Index to evaluation measurement invariance. These three approaches are independent of model complexity and sample size.…

Describes a cost-effective way to create an effective simulation for students that teaches them how personal computers are used in the workplace. (JOW)

A computer-assisted, K-fold cross-validation technique is discussed in the framework of canonical correlation analysis of randomly generated data sets. Analysis results suggest that this technique can effectively reduce the contamination of canonical variates and canonical correlations by sample-specific variance components. (Author/SLD)

Tips include (1) don't confuse replication with simulation; (2) choose the right subject; (3) develop a design plan; (4) make trainees responsible for actions; (5) use symbols for emotionally charged ideas; (6) don't play games; (7) use nontrainees for realism; (8) assess performance appropriately; (9) alpha test in low-risk situations; and (10)…

Describes a simulation that can be used in the classroom to help clarify difficult concepts in protein synthesis. (ZWH)

Develops a cultural transmission model with the following variables: worker entry and exit rate, organization growth rate, recruiting selectivity, socialization intensity, and the rate that socialization decays if not reinforced. A computer simulation of the model found that cultural systems in organizations are highly robust and reach equilibrium…

Discussion of the design of games and simulations focuses on the fundamental defining features called deep structure. The two main levels of interaction in games and simulations are described; generalized reinforcers are discussed; types of defective contingencies are explained, including escape or avoidance behaviors; and the concept of negative…

Using simulated data modeled after real tests, a Thurstone method (L. Thurstone, 1925 and later) and three-parameter item response theory were compared for vertical scaling. Neither procedure produced artificial scale shrinkage, and both produced modest scale expansion for one simulated condition. (SLD)

Presents a three-way, three-mode extension of the two-way, two-mode hierarchical classes model of P. De Boeck and S. Rosenberg (1998) for the analysis of individual differences in binary object x attribute arrays. Illustrates the model with data on psychiatric diagnosis and discusses the relation between the model and other extant models. (SLD)

Studied item and trait parameter recovery for Andrich's rating-scale model (D. Andrich, 1978) using the PARSCALE computer program. Simulation results suggest that Andrich's rating scale allows the use of considerably smaller calibration samples than are typically recommended for other polytomous item-response-theory models. (SLD)

Suggests that insight as a participant-observer is more valuable than merely hearing about other people's experiences. Discusses experiential learning, the use of simulations and structured exercises as safe places to take risks, and learning cultural patterns of assumption. (LRW)

Describes SimSum (Simulation of Summarizing), which simulates 20 real-world working steps of expert summarizers. Presents an empirically founded cognitive model of summarizing and demonstrates that human summarization strategies can be simulated. Discusses current research in automatic summarization, summarizing in the World Wide Web, and…