A quantitative model of speech development is proposed based on observations of normal hearing and congenitally deaf children. Nonlinear controls used during the development of suprasegmental and segmental aspects of speech are identified. Linguistic components of speech are ignored. The importance of the associative cortex in speech-motor control…

A method is presented for analyzing data collected in a multiple group time-series design. This consists of testing linear hypotheses about the experimental and control group-means. Both a multivariate and a univariate procedure are described. (Author/GK)

The teaching of technology in the early years and, in particular, in the first and second year architectural design studios, is discussed. Technology implies performance, which may be measured in nonvisual ways, and implies the application of scientific principles to the building design process. (MLW)

Various simple ex post wealth neutrality measures capture different aspects of the concept; the use of one measure alone or several measures independently can lead to interpretation problems. The Adjusted Relationship Measure is introduced to pay attention to actual revenue differences associated with wealth differences. (Author/BW)

This study investigated the extent to which various latent class models adequately described elementary rule-governed mathematical behaviors. Children were given a fraction concepts test. Results supported the adoption of a set of three-class models including a mastery class, a nonmastery class, and a transitional class to describe the data.…

A discussion of the mathematics of rugby is related to an earlier article about mathematics and the physical world. (MP)

This article argues that systems thinking transcends disciplinary boundaries and should be part of everyone's education. Stresses future importance of systems global models and their capacity for planning and decision making on a world scale. A tentative topic outline for a systems approach course at university level is proposed. (Author/SMB)

Proposes a model of library output as an abstract quantity, and relates it to other components of library performance. The consequences of basing library funding on such measurable outputs as circulation are also examined in light of the proposed model. A 13-item reference list and four figures are provided. (JL)

Describes a variation of the familiar laboratory investigation on the spring and mass oscillator. (SK)

The paper considers the problem of selecting the t best of k normal populations and simultaneously determining whether the selected populations have a mean larger than a known standard. Illustrations are given for selecting the t best of k examinees when the binomial error model applies. (Author)

This paper delineates conditions under which the use of change scores will not produce misleading results, and may perhaps be preferable to other methods of analysis. The validity of change scores in randomized pretest-posttest designs is discussed along with situations where analysis of change scores should be used. (Author/GK)

Some ways to link calculus instruction with the mathematical models used in physics courses are presented. The activity of modelling is presented as a major tool in synchronizing physics and mathematics instruction in undergraduate engineering programs. (MP)

The cognitive method, an algorithmic method for transforming verbal word problems into equations, equation systems, inequalities, etc., is presented and discussed. The psychological and mathematical aspects of the cognitive method are also reviewed. (MP)

Aspects of the source of power of mathematics and the ways in which mathematics works are discussed. The author discusses various philosophies about mathematics, presents several unusual "real world" problems, and reviews the social consequences of the "imposition of mathematics" on humanity. (MP)

Graph theory is presented as a tool to instruct high school mathematics students. A variety of real world problems can be modeled which help students recognize the importance and difficulty of applying mathematics. (MP)