Presents two models of group decision making that integrate mathematical, multicriteria models with behavioral problem-solving concepts. The results of an empirical test that used the Business Management Laboratory simulation game are reported, and the performance of the two integrated models is compared with the performance of a nonintegrated…

Equatings were performed on both simulated and real data sets using common-examinee design and two abilities for each examinee. Results indicate that effective equating, as measured by comparability of true scores, is possible with the techniques used in this study. However, the stability of the ability estimates proved unsatisfactory. (TJH)

A new model is presented that explains reaction time fluctuations in prolonged work tasks. The model extends the so-called Poisson-Erlang model and accounts for long-term trend effects in the reaction time curve. The model is consistent with Spearman's hypothesis that inhibition increases during work and decreases during rest. (TJH)

Children in grades four and five had instruction on fractions with a continuous manipulative aid to help transfer their knowledge to tasks with a discrete manipulative aid. Results suggest that discrete-embodiment tasks are more difficult than continuous-embodiment tasks. (MNS)

This issue contains articles on mathematical modeling of school arithmetic word problems; cognitive load theory; cognitive effects of practical experience for high and low achievers; perspectives of college-bound students on learning mathematics; and training-based assessment of school achievement. (SLD)

Describes a new approach for analyzing an individual's responses made at multiple times. Proposes that three sources of variance determine a person's current standing on a variable: trait (term does not change), state (term changes), and error (random term). Shows how structural equation modeling can be used and presents an extended example. (RJM)

Describes a computerized decision support system based on circulation data that was developed to assist the Indianapolis-Marion County Public Library in materials acquisition budgeting and other library management decision making. The budget allocation model is explained, and implementation and testing of the decision support system is described.…

A procedure is described for estimating the reliability and conditional standard errors of measurement of scale scores incorporating the discrete transformation of raw scores to scale scores. The method is illustrated using a strong true score model, and practical applications are described. (SLD)

Effects of dimensionality on ability estimation of an adaptive test were examined using generated data in Bayesian computerized adaptive testing (CAT) simulations. Generally, increasing interdimensional difficulty association produced a slight decrease in test length and an increase in accuracy of ability estimation as assessed by root mean square…

Scaling methodologies used in analysis of National Assessment of Educational Progress (NAEP) surveys since 1984 are reviewed. The plausible values methodology developed for NAEP scale-score analyses is described in the contexts of item response theory and average response method scaling. Current NAEP research in scaling is discussed. (SLD)

Presents a problem to determine conditions under which two identical masses, constrained to move along two perpendicular wires, would collide when positioned on the wires and released with no initial velocity. Offers a solution that utilizes the position of the center of mass and a computer simulation of the phenomenon. (MDH)

The exact and closed-interval area measures for detecting differential item functioning are compared for actual data from 1,000 African-American and 1,000 white college students taking a vocabulary test with items intentionally constructed to favor 1 set of examinees. No real differences in detection of biased items were found. (SLD)

For paired rankings data, a statistical test is proposed to detect whether subjects' posttreatment rankings have moved systematically toward an unknown ranking or set of rankings. Using paired-rankings from 38 ninth graders in a writing and literary criticism course, graphical methods for representing the data are presented. (SLD)

Discussion of the growth of the Internet focuses on the rate of growth based on three measurements of changes in reachable Internet services: (1) the rate at which sites initiate network connectivity; (2) the rate at which sites become directly connected; and (3) the rate at which sites distance themselves, usually for security reasons. (Contains…

Item response theory (IRT) is used to develop a form of adjusted cumulative grade point average (GPA) for use in predicting college academic performance appropriately for males and females. For 1,564 students at Stanford University (California), the IRT-based GPA was more predictable from preadmission measures than the cumulative GPA. (SLD)