Statistical procedures are presented for determining ordinal and disordinal aptitude-treatment interactions with linear and curvilinear data. The paper presents a method for testing the homogeneity of group regressions for a single aptitude and provides models for expanding this test to linear and curvilinear regression planes. Procedures are…

This research paper proposes several mathematical models which help clarify Piaget's theory of cognition on the concrete and formal operational stages. Some modified lattice models were used for the concrete stage and a combined Boolean Algebra and group theory model was used for the formal stage. The researcher used experiments cited in the…

This study investigated the comparability of SAT Verbal and Mathematical scores for nonhandicapped examinees taking standard administrations and handicapped populations taking extended-time, special administrations. Results showed the two common-factor model to provide a reasonable fit in all populations with the mathematical factor fitting…

Presents a review of microcomputer-based software packages that have been designed for Operations Research, Management Science, and Production and Operations Management. Listed for each package are price for student use, minimum system requirements needed to run the package, and maximum capability constraints. (PK)

Data concerning state-local systems of financing public education in Illinois reveal inequities across districts of different types as well as between districts of the same type. The procedure should be of value in appraising school finance inequities in states with diverse patterns of school district organization. (MLF)

Presents an overview of a governmental (centralized) program for the application of computers in Hungary and the education of computer specialists. Outlines steps for solving modelized problems and discusses computers and computer education in the schools. (DC)

Topics concerning latent trait theory are addressed: (1) dimensionality of latent space, local independence, and item characteristic curves; (2) models--equations, parameter estimation, testing assumptions, and goodness of fit, (3) applications test developments, item bias, tailored testing and equating; and (4) advantages over classical…

Presents a general mathematical model for measuring the factors which directly and indirectly affect the costs of maintaining a clinical education program in a hospital's allied health department. Specific application of the model to a physical therapy department deomonstrates how an institution can measure the costs of education on a per student…

The accuracy of estimation of the subjects' latent ability maintained by tailoring for each testee the order of item presentation and the border of item dichotomization was compared to the information provided by the original graded test items. (RC)

Presents a structural supply/demand model for enrollment places in parochial schools and uses it to evaluate alternative voucher policy designs. Uses the model's estimated parameters to simulate effects of differently sized and targeted vouchers on public and private school attendance, districts' fiscal status, and public educational costs.…

Reports on the graphing work of children, aged eight and nine years, who have access to portable computers across the curriculum. Describes two learning sequences: in one, the children collected data and then explored the computer graphing facilities; and in the other, graphing is used iteratively as an integral part of the ongoing task.…

A salary-growth model is presented as a practical solution to the problem of compensating teachers equitably. An empirical validation using data from 24,785 California teachers, 15,233 Ohio teachers, and 5,489 South Carolina teachers demonstrates the general applicability of the model. A scenario for model use is presented. (SLD)

Discussed is the place and teaching of trigonometry in a NCTM Standards-based mathematics curriculum. Presented is how these standards can be implemented in a technology-rich environment that encourages reasoning, communication, problem solving, and confidence building. Examples focus on functions, graphical sense, modeling, and identities. (KR)

Concrete experience should be a first step in the development of new abstract concepts and their symbolization. Presents concrete activities based on Hyde and Nelson's work with egg cartons and Steiner's work with money to develop students' understanding of partitive division when using fractions. (MDH)

Validity evidence for a new instrument, the Situation-Response Measure of Achievement Motivation for analyzing cross-situational consistency of achievement-related behavior, is presented in a study of 246 college students. Exploratory factor analysis indicates the presence of two factors, striving and apprehensiveness. (SLD)