Although there are many methods available for dimensionality assessment for items with monotone item response functions, there are few methods available for unfolding item response theory models. In this study, a modification of Yen's Q3 statistic is proposed for the case of these nonmonotone item response models. Through a simulation study, the…

Adaptive decision making requires that contingencies between decision options and their relative assets be assessed accurately and quickly. The present research addresses the challenging notion that contingencies may be more visible from small than from large samples of observations. An algorithmic account for such a seemingly paradoxical effect…

Predictions derived from the interactive activation (IA) model were tested in 3 experiments using the masked priming technique in the lexical decision task. Experiment 1 showed a strong effect of prime lexicality: Classifications of target words were facilitated by orthographically related nonword primes (relative to unrelated nonword primes) but…

Cross-classified random effects modeling (CCREM) is used to model multilevel data from nonhierarchical contexts. These models are widely discussed but infrequently used in social science research. Because little research exists assessing when it is necessary to use CCREM, 2 studies were conducted. A real data set with a cross-classified structure…

In this paper we discuss how the Brigham Young University Technology Assisted Language Learning Group (BYU TALL Group) develops video-based dramatic narratives to increase the amount of context we provide to English as a second language (ESL) learners. First, we discuss the problem of decontextualization in education, the contextualism…

Consider test data, a specified set of dichotomous skills measured by the test, and an IRT cognitive diagnosis model (ICDM). Statistical estimation of the data set using the ICDM can provide examinee estimates of mastery for these skills, referred to generally as attributes. With such detailed information about each examinee, future instruction…

The increasing complexity of human body models enabled by advances in diagnostic imaging, computing, and growing knowledge calls for the development of a new generation of systems for intelligent exploration of these models. Here, we introduce a novel paradigm for the exploration of digital body models illustrating cerebral vasculature. It enables…

This paper introduces a hardware and software independent model for producing educational computer simulation environments. The model, which is based on the results of 32 studies of educational computer simulations program production, implies that educational computer simulation environments are specified, constructed, tested, implemented, and…

An investigation was conducted of the eligibility and classification decisions of 223 educational professionals who participated in a special education simulation exercise. Data from their decisions were characterized by much variability and inaccuracy. Fifty-one percent of the Ss declared a student with assessment data in the normal range to be…

A British project in engineering science is described. Computer assisted instruction packages are being developed to provide students with experience with models or systems of models related to lecture material on electrical, electronic, nuclear, and mechanical engineering. (SD)

The use of an electoral college simulation model by college students is described. At least 16 students should participate to represent four geographical regions: the Northeast, the South, the Midwest, and the West. The electoral college simulation is most relevant in courses on American politics, the United States presidency, and elections.…

This chapter considers the history of instructional development (ID) in the military, with particular emphasis on the U.S. Navy. The ID process used at the Navy's Instructional Program Development Centers is presented, including the process for simulator development. An in-depth analysis of the problems encountered with educational technology…

The concept of a qualitative model provides a unifying perspective for understanding how expert systems differ from conventional programs. Knowledge bases contain qualitative models of systems in the world, that is, primarily non-numeric descriptions that provide a basis for explaining and predicting behavior and formulating action plans. The…

The report describes activities and results of the second year of the Special Education Planning Model (SEPM), designed to help planners and policymakers estimate special education program needs and costs. SEPM uses a computer simulation based on users' assumptions and priorities in such areas as incidence rates, handicapping conditions to be…

To help assess the consequences of food policies, the world's food system is being assembled into models. These models should help planners evaluate the impact of food-related policies and will try to account for the interactions of all food-related supply and demand factors. (BT)