Type I error rates for the Mantel-Haenszel (MH) statistic were within nominal limits when the MH procedure was compared with the simultaneous item bias (SIB) method for detecting differential item functioning. Results with data simulated for 1,296 conditions found Type I error rates slightly higher than expected for SIB. (SLD)

Discussion of the use of consensus-building techniques to resolve public policy disputes focuses on the use of a simulation of the conflict that needs to be resolved. An example is given of the National Energy Policy Simulation that was designed by the Massachusetts Institute of Technology (MIT)-Harvard Public Disputes Program. (38 references)…

A recursive equation is proposed for computing higher order derivatives of elementary symmetric functions in the Rasch model. A simulation study indicates a small loss in accuracy for the proposed formula compared to Gustafsson's sum algorithm (1980) for computing higher order derivatives when tests contain 60 items or less. (SLD)

A simple procedure for measuring changes in the acoustic impedance of the ear is described. The technique has several applications, including simulation using a standard coupler of changes in real ear impedance produced by the acoustic reflex, and calibration of response time of an otoadmittance meter. (Author/DB)

Discussion of the interpolation methodology expounded by Goosen and Kusel to model business functions for simulation design criticizes the approach's simplicity because interactive effects between variables in the functional relationships are not considered. (six references) (EA)

Advantages of simulation are link between classroom and real experience, experiment with risk, intensive focus, and reflection on experience. It can involve rigorous and time-consuming preparation, unpredictable outcomes, and trainee resistance. Facilitators need good coaching skills and personal sensitivity. (SK)

Meaningful role plays have three phases: warm-up, which creates an environment that fosters interaction and overcomes resistance; action, during which protagonists and auxiliaries are chosen and the action is periodically frozen for reflection and feedback; and closure, to reinforce learning and plan its integration into job performance. (SK)

Investigated the effects of types and prevalence of response patterns that might be provided by nonattending respondents on Cronbach's alpha (L. Cronbach, 1970) using three simulated data sets. Effects were greater as a function of increased prevalence in the respondent group, but as few as 5% of some types of nonattending patterns had inflating…

Examined the effects of model misspecification on the precision of decisions made using the sequential probability ratio test (SPRT) in computer testing. Simulation results show that the one-parameter logistic model produced more errors than the true model. (SLD)

Examined the optimal value of "k" for promax factor rotations through a Monte Carlo study involving 10,080 factor analyses. Results show that in factor-analytic studies using promax, the value of "k" may be set appropriately at 2, 3, or 4. (Author/SLD)

Proposes a parallel distributed-processing (PDP) model to account for choice-reaction-time performance in diverse cognitive and perceptual tasks that are interrelated in terms of stimulus-stimulus and stimulus-response overlap. Simulation results support the PDP model. (SLD)

Describes a simulation activity that has most of the features of a real situation. Discusses how this activity worked in the language classroom. (Author/VWL)

Investigated incorporating a testlet definition into the estimation of the conditional standard error of measurement (SEM) for tests composed of testlets using five conditional SEM estimation methods. Results from 3,876 tests from the Iowa Tests of Basic Skills and 1,000 simulated responses show that item-based methods provide lower conditional…

Discusses skill transfer and training methods that encourage learners to develop strategic knowledge to maximize transfer. Considers teaching knowledge of goal interactions and side effects to enhance domain-specific strategies and describes an experiment that examined the extent to which transfer is facilitated by strategic knowledge. (Author/LRW)

Provides a model of the basis of the differentiation process consisting of item detectors that learn estimates of conditional probabilities of item features. The model is used to account for a number of findings in the recognition-memory literature including the differentiation effect. Simulations illustrate the model. (SLD)