In contrast to exemplar and decision-bound categorization models, the memory and contrast models described here do not assume that long-term representations of stimulus magnitudes are available. Instead, stimuli are assumed to be categorized using only their differences from a few recent stimuli. To test this alternative, the authors examined…

If a curriculum developer's goal is to create a single linear sequence of tasks that lead to the development of some important mathematical concept, then some researchers have suggested that these sequences should follow progressions similar to stages of development that have been identified in Piaget-like research on the relevant concept(s).…

Some band teachers wonder why they often have to repeat themselves several times for their band students. Of course there may be more than one reason, but it is possible that some teachers are accommodating only one learning style with their teaching. After the author of this article did a bit of study, he thought this might have been happening to…

This paper proposes a genetic development of the concept of limit of a sequence leading to a definition, through a succession of proofs rather than through a succession of sequences or a succession of epsilons. The major ideas on which it is based are historical and depend on Euclid, Archimedes, Fermat, Wallis and Newton. Proofs of equality by…

Purpose: The purpose of this study was to compare the electroacoustic outputs of frequency-modulated (FM) systems coupled to hearing aids. Method: Electroacoustic performance of FM systems coupled to hearing aids was determined for 3 FM receivers: body-worn with neck loop, ear-level nonprogrammable, and ear-level programmable. Systems were…

Despite the best of intentions, qualitative researchers can be faced, in some circumstances, with having to make meaning from thin, or less than optimal, data. Using a real study as context, the authors describe the ways that they made sense of their thin data on teachers' perceptions of a large-scale evaluation instrument. They propose a…

This article responds to the reply by Cooper and Shallice to Botvinick and Plaut's previous comment . In the authors' view, the reply by Cooper and Shallice left their original responses more or less intact. The present exchange has strongly highlighted the degree to which any account of the habit system will interact with how the goal-directed…

A simulation study of a sequential computerized mastery test is carried out with items modeled with the 3 parameter logistic item response theory model. The examinees' responses are either identically distributed, not identically distributed, or not identically distributed together with estimation errors in the item characteristics. The…

This study examined the sequencing of instruction in a course in physical therapy. In the first phase, a procedural elaboration sequence was designed using the Simplifying Assumptions Method. In the second phase, a prescriptive-theoretical elaboration sequence independent of the procedural sequence was designed. A descriptive-theoretical…

A general framework is presented for the Sheridan School District K-12 social studies curriculum. The guide is arranged into three sections: rationale, goals and objectives, and scope and sequence. The rationale section emphasizes that students should develop awareness of individual rights and responsibilities, cope with the problems of our…

Reviewing results of experiments in which sequence of motion picture shots was varied, the author concludes that the meaning of individual shots varies with changes in order and context. (Editor)

Program Evaluation and Review Technique (PERT) is a statistical technique, developed by the U.S. Navy, for analyzing and quantifying uncertainties in sequential or parallel activities essential for completing a project within certain parameters. It focuses management attention on points that require remedial action or tradeoff in time (or other…

A school planning scheme involving 46 principle activities which occur over a 38-month period is presented. This scheme was developed for individuals responsible for the planning of vocational and technical schools, i.e., supervisors, state staff, university school plant planners, architects, and local school administrators. The activities…

A pre-testing orientation was incorporated into the Work Incentives Program, a pre-vocational program for disadvantaged youth. Test-taking skills were taught in seven and one half hours of instruction and a variety of methods were used to provide a sequential experience with distributed learning, positive reinforcement, and immediate feedback of…

This handbook has been designed to serve as a resource book to familiarize teachers with the basics of nongrading. The opening chapter provides the general rationale, followed by a concise explanation of the philosophy and theory of nongradedness. Other chapters deal with the need for nongradedness and its implementation, the role of the teacher,…