The structure, execution, uses, and software specifications for this spreadsheet file are discussed. Availability and modifications of this program are described. (CW)

Discusses a laboratory exercise simulating the paths of light rays through spherical water drops by applying principles of ray optics and geometry. Describes four parts: determining the output angles, computer simulation, explorations, model testing, and solutions. Provides a computer program and some diagrams. (YP)

In applying I. I. Bejar's method for detecting the dimensionality of achievement tests, researchers should be cautious in interpreting the slope of the principal axis. Other information from the data is needed in conjunction with Bejar's method of addressing item dimensionality. (SLD)

A method of assessing rater reliability via a design of overlapping rater teams is presented. Covariances or correlations of ratings can be analyzed with LISREL models. Models in which the rater reliabilities are congeneric, tau-equivalent, or parallel can be tested. Two examples based on essay ratings are presented. (TJH)

A study assessed the effects of three teaching strategies that incorporated a microcomputer component: (1) tutorial, (2) drill and practice, and (3) simulation. Each strategy was compared with one another and with the traditional lecture/discussion method. Student achievement and attitudes were essentially equal in all four methods. (JOW)

Recounts personal experiences in the design of simulations/gaming for city development and planning. Notes early games and describes the development of three land use and city growth games. Discusses revisions, conference demonstrations of the games, and collaborative efforts. (AEF)

Analyzes shortcomings of computer monitors, including one-way communication and organization of the monitor display, when they are used with multimedia in open learning environments. Solutions are described according to the concepts and theories developed by Min, Koopal, Gritter, Struyker, Boudier, Coleman, Miltenburg, and Van Schaick Zillesen…

Describes the design and development of training materials to encourage the use of telecommunications by Florida teachers that was funded by the Florida Department of Education. Topics addressed include the need for training materials; electronic mail; booklets; computer tutorials/simulation; the use of HyperCard; and results of an effectiveness…

Describes virtual reality (VR) technology and VR research on education and training. Focuses on immersion as the key added value of VR, analyzes cognitive variables connected to immersion, how it is generated in synthetic environments and its benefits. Discusses value of tracked, immersive visual displays over nonimmersive simulations. Contains 78…

Discusses a case study of a project created for the U.S. Air Force, Air Combat Command, in which mental models were taught, reinforced, and assessed as the foundation for instruction. Preliminary data for 183 students reflected a 93% mastery level and a 79% cumulative gain in students' ability to troubleshoot difficult problems. (Author/AEF)

Project ICONS (International Communication and Negotiation Simulation) is a computer-assisted simulation that casts students in diplomat and policymaker roles. Thrust into a laboratory of high-powered negotiations, they grapple with solutions to real and urgent international issues: world health, human rights, and the spread of nuclear technology.…

Presents hyper-lib, a model for an electronic library. Defines the hyper-lib model in terms of structural and functional components; discusses the book collection, the librarian, the library rooms, user resources, and general and specific library services. Describes various operators, which allow the user to change the system state. (AEF)

A theory describing the functioning of an individual in the presence of others is examined through computer simulation by explaining Latane's theory of social impact (as applied to attitudes). Computer simulation may be useful to help determine the extent to which group-level phenomena result from individual-level processes. (SLD)

Describes a new direction for conservation efforts influenced by the advance of the information age and the introduction of many technologically sophisticated information collecting devices. Devices include microscopic computer chips, miniature electronic components, and Earth-observation satellite. (MCO)

A technique is presented to transform incomplete categorical data into complete data by imputing appropriate scores into missing cells. A solution of the optimization problem is suggested, and relevant psychometric theory is discussed. The average correlation should be at least 0.50 before the method becomes practical. (SLD)