A new way of information retrieval: 3‐D indexing and concept mapping

After a brief discussion of mind mapping and concept mapping, a model for a ‘3‐D index’ is developed which combines a concept map with an index to enable hierarchical and relational data retrieval. It is suggested that such sophisticated information retrieval methods are required for the complex and extensive electronic data sources and encyclopaedic‐type titles now being compiled.     

Biomechanics teachers can be animals

The aim of this study was to determine whether a constructivist approach, in particular a visit to a zoo, could be effective in consolidating mechanical concepts and applying those concepts to coaching and teaching. Ten students in their final year of their Bachelor of Physical Education at the University of Edinburgh participated in a visit to Edinburgh Zoo. During the visit students completed a worksheet of questions and engaged interactively in discussing how various animals are adapted mechanically to survive in their environments. Immediately after the visit they completed a questionnaire with four sections. The first section assessed whether they could apply the mechanical concepts discussed during the visit to human sports performance. The second canvassed their opinions on whether the visit was effective in reinforcing mechanical concepts, in developing 'lateral thinking' about mechanical concepts, and in improving their ability to apply mechanical concepts to coaching and teaching. The third canvassed their opinions on whether the visit would be effective for senior high school Physical Education and Sports Science students for developing mechanical concepts and applying them to coaching. The fourth section canvassed their opinions on when the visit should be conducted for Physical Education and Sports Science students in universities and in senior high schools. The results indicated that the visit was effective in reinforcing mechanical concepts and in applying them laterally to improve understanding of human sports performance. Participants believed that the visit would also be effective for senior high school students. All participants believed that the visit would be most beneficial after at least one course in biomechanics that covers the basic biomechanical principles.     

Two failures in computer-mediated textcommunication

The low uptake of computer text conferencing, despite its unique functionality, suggests that developers of this technology have paid insufficient attention to human factors. In Ergonomics (Human Factors Engineering) the study of untoward events such as user errors, systems failures and disasters is a widely-used and fruitful research strategy. Anomalous and unexpected events and actions likewise constitute an important source of data and insights for sociological, ethnographic and linguistic studies of human communication. In the present paper we combine these traditions, applying qualitative failure analysis to computer-mediated text conferencing. The data is drawn from two episodes of communication failure involving geographically dispersed groups engaged in different types of task. In one episode a consultative discussion aimed at the development of professional expertise collapsed in rancour. In the other, a design error was propagated, through misunderstanding, into the implementation stage of a project. The analysis has substantive implications for user training in new types of writing and reading skill and for the functional and interface design of textcommunication systems. There are also methodological implications for studies of computer mediated communications. It is argued that a surface analysis of the episodes is insufficient for full understanding of the communication failures: the record must be interpreted in the context of the practices, institutions and structures that exist in the social world outside the computerised textcommunication system.     

Variables in Eliciting Writing Samples

What is the impact on students' writing samples of such factors as prompt features, prewriting activities, time limits, and examiner practices? How can these variables be systematically reported?     

Variation in Vocabulary Development as a Function of Birth Order

Several researchers have argued for birth-order differences in the rate and style of children's early vocabulary development. However, the results of those studies that have examined these issues directly have so far proved inconclusive. In the present study, an attempt was made to examine the question of birth-order differences in children's early vocabulary development by comparing the composition and age of acquisition of the first 50 and 100 words of 9 firstborns and their younger siblings using a longitudinal maternal diary methodology. A small but significant birth-order effect was found for the age at which the 50-word milestone was reached. However, there was no significant difference in age at 100 words, and there was a strong correlation between sibling pairs on both of these measures. As regards qualitative differences, second-borns had a significantly higher percentage of frozen phrases in their first 100 words and a significantly higher percentage of deictic personal pronouns in their first 50 and 100 words. However, no differences were found in the percentage of common nouns at either measurement point. It is argued that, on balance, these results are more consistent with a "different" than a "disadvantaged" view of later-borns' early language, and that those differences that do exist may be due, at least in part, to the occurrence of a higher degree of observational learning in second-borns' early language acquisition.     

AN INVESTIGATION INTO THE PRIOR ECONOMIC EXPERIENCE OF PRIMARY EDUCATION STUDENTS

This paper summarises the findings of an analysis of primary education students’ backgrounds and economic experiences, relating this to their economic and industrial understanding. The research was conducted in the 1990‐91 period by the Primary Schools and Industry Centre of the Polytechnic of North London, under the sponsorship and aegis of E ATE. The project team consisted of the present writer with Merryn Hutchings (PNL) and John Ahier (Homerton College). The full research report is published by EATE as The Economic and Industrial background, understanding and attitudes of Student Primary Teachers: EATE Research Report No. 1.     

Effect of floor conditions upon frictional characteristics of squash court shoes

Vertical (FN) and horizontal (FH) forces were recorded while four vertically-loaded court shoes were dragged horizontally across six types of floor surface. Variation in coefficient of limiting friction (FH/FN) between floor surfaces was greater than that between shoes. Squash strokes were also performed on the same surfaces during which FH/FN was calculated. Slips occurred on some surfaces either at heel contact or upon attainment of full-sole contact. It is concluded that the coefficient of limiting friction obtained during full-sole contact with the floor is a suitable means of distinguishing between tractional qualities of shoes. Alternatively, this measure is an inadequate predictor of the likelihood of slips in the game of squash racquets. Dusty floor conditions produce poor traction as does a damp sealed floor. As sweat droplets are unavoidable in the game, floors sealed with urethane represent a significant hazard. Bare, clean, wooden flooring which can absorb moisture represents a better surface than a sealed floor from the point of view of traction.     

Technique and timing in women's and men's reverse one and one half somersault with two and one half twists (5335D) and men's reverse one and one half somersault with three and one half twists (5337D) 3 m springboard dives

The purpose of this study was to compare timing and technique of males and females performing reverse twisting dives in elite international competition. Video data of the dives performed at the 1999 FINA World Diving Cup were captured and digitised to obtain times and postures of the divers at specific events including takeoff and entry. Estimates of flight height and mass-normalised work done on the springboard were obtained from flight times. The data indicated that many males are able to complete an additional twist rotation because they attain more height, and therefore more time in the air, than females.