A study involving 1,000 simulated examinees compared the partial credit and graded response models in computerized adaptive testing (CAT). The graded response model fit the data well and provided slightly more accurate ability estimates than those of the partial credit model. Benefits of polytomous model-based CATs are discussed. (SLD)

Discussion of the use of simulations for licensure testing highlights the Dental Interactive Simulations Corporation (DISC) project that uses interactive video patient simulations for dental education and licensure. Topics addressed include reliability, validity, test administration issues, effects of fidelity on reliability and validity, and…

Discusses the mathematical model presented by Vito Volterra to describe the dynamics of population density. Discusses the predator prey relationship, presents an computer simulated model from marine life involving sharks and mackerels, and discusses ecological chaos. (MDH)

Describes the development of a low-cost desktop simulator for basic training of train drivers that is being tested by British Rail. The use and advantages of digital video interactive (DVI) technology are explained, limitations of videodisks are noted, the design of the simulator is described, and future developments are considered. (LRW)

Discusses the value of educational simulation in enhancing teaching. It is effective because it is a realistic, active learning experience, it is highly interpersonal, there is an element of play, and it demands that participants think of ideas and implement strategies and solutions. (SM)

Describes projects at the University of Central Florida to test new training technologies under controlled but realistic settings. Original plans for an "Experimental Prototyping Classroom" are discussed; and current developments in language training research, gaming technology, and virtual environments are described. (EAM)

This article examines the concept of interactivity and discusses human-to-human interactivity versus computer-to-human interaction in education. Levels of communicative interdependence are explained, variables that are important ingredients of interactivity are discussed, learner control is discussed, and two interactive instructional systems are…

A method is proposed for sequential evaluation of reliability of psychometric instruments. Sample size is unfixed; a test statistic is computed after each person is sampled and a decision is made in each stage of the sampling process. Results from a series of Monte-Carlo experiments establish the method's efficiency. (SLD)

Considers three main components of self-directed learning: (1) topic knowledge; (2) procedural skills; and (3) self-monitoring. The role of computer-assisted instruction in autonomous learning is discussed, software that fosters independent problem solving is reviewed, and it is recommended that computers be incorporated in courses emphasizing…

A computer program that replaces a set of pharmacology and physiology laboratory experiments on live animals or isolated organs is described and illustrated. Five experiments are simulated: dose-effect relationships on smooth muscle, blood pressure and catecholamines, neuromuscular signal transmission, acetylcholine and the circulation, and…

Discusses the activities of Junior Achievement of Georgia in its efforts to promote economic education. Describes programs developed on economics: a textbook, workbook exercises, a student company activity, computer based simulation, and a business consultancy. Explains the development of a curriculum for kindergarten through sixth grade and…

Computer simulations were run to measure the relationship between testlet validity and factors of item pool size and testlet length for both adaptive and linearly constructed testlets. Making a testlet adaptive yields only modest increases in aggregate validity because of the peakedness of the typical proficiency distribution. (Author/SLD)

Methodology is suggested for several statistical procedures to detect polytomously scored items that function differently for two subgroups of examinees. The 3 methods are alternative ways of combining the data from 2 x "k" tables. Simulation results demonstrate the superiority of two of the methods, designated HW1 and HW3. (SLD)

Review of research and development on the design of computer-based simulation for diagnostic training highlights the development and evaluation of eight diagnostic training systems that explored the appropriate level of student modeling needed for technology training. Topics addressed include changes in interface design, displays, and system…

Describes a variety of computer software programs and student activities utilizing the computer to help teach secondary social studies. Suggests using word processors, painting programs, and computer simulations for history and government courses. Concludes that successful use of computers in social studies instruction depends on the design of…