Human handedness in interactive situations: Negative perceptual frequency effects can be reversed!

Abstract

Left-handed performers seem to enjoy an advantage in interactive sports. Researchers suggest this is predominantly due to the relative scarcity of left-handers compared with right-handers. Such negative frequency-dependent advantages are likely to appear in inefficient game-play behaviour against left-handed opponents such as reduced ability to correctly anticipate left-handers' action intentions. We used a pre–post retention design to test whether such negative frequency-dependent perceptual effects can be reversed via effective training. In a video-based test, 30 handball novices anticipated the shot outcome of temporally occluded handball penalties thrown by right- and left-handed players. Between the pre- and post-tests, participants underwent a perceptual training programme to improve prediction accuracy, followed by an unfilled retention test one week later. Participants were divided into two hand-specific training groups (i.e. only right- or left-handed shots were presented during training) and a mixed group (i.e. both right- and left-handed shots were presented). Our results support the negative frequency-dependent advantage hypothesis, as hand-specific perceptual training led to side-specific improvement of anticipation skills. Similarly, findings provide experimental evidence to support the contention that negatively frequency-dependent selection mechanisms contributed to the maintenance of the handedness polymorphism.     

Theoretical Modeling of Grip Firmness during Ball-Racket Impact

Abstract

This study was undertaken to establish theoretical bases for the experimental results reported by Baker and Putnam (1979), and Walanabe, Ikegami and Miyashita (1979), concerning grip firmness on a tennis racket and its effect on the ratio of post- to pre-impact ball velocity. The model predicted that, for central impacts, there was no change in the ball velocity ratio when a regular tennis racket was tightly clamped at the grip or allowed to freely stand on its butt. To validate the model further, alterations were made to two parameters of the racket—a tennis racket was modified to increase the stiffness, and a racketball racket was used to simulate a shortened tennis racket. Multiple exposure photographs were taken of balls striking the center of the rackets under the two extremes of grip firmness. Measurements were taken from enlargements of these photographs in order to calculate the horizontal component of post- to pre-impact ball velocity. It was found that shortening the length and greatly increasing the stiffness was required before the effect of grip firmness was noticeable.     

Book reviews

Richard Cox, Sport — A Guide to Historical Sources in the UK (London, Sports Council, 1983). Pp.vii + 61. £8.00 ISBN 0 906577 34 9.

P.B. Munsche, Gentlemen and Poachers: The English Game Laws 1671–1831 (Cambridge, CUP, 1983). Pp.x + 255. £18.50. ISBN 0 521 23284 8.

Garry Whannel, Blowing the Whistle: The Politics of Sport (London, Pluto Press, 1983). Pp. 117. £2.50. ISBN 0 86104 508 4.

David Smith and Gareth Williams, Fields of Praise: The Official History of the Welsh Rugby Union 1881–1981 (Cardiff, University of Wales Press, 1980). Pp.xii + 505. £12.95. ISBN 0 7083 07663.

John Arlott, Jack Hobbs — Profile of ‘The Master’ (London, John Murray and Davis‐Poynter, 1981). Pp. 144. £6.95. ISBN 07195 3886 6 (John Murray) and 0 7067 0214 X (Davis‐Poynter).

Richard S. Gruneau, Class, Sports and Social Development (Amherst, The University of Massachusetts Press, 1983). Pp.x + 213. $18.50 and $9.50. ISBN 0 87023 387 4 and 0 87023 388 2.

R. Roberts, Jack Dempsey: The Manassa Mauler (London, Louisiana State University Press 1984). Pp.314. £8.50. ISBN 8071 1161 9.

Richard Cashman and Michael McKernan (eds.), Sport: Money, Morality and the Media (Kensington, NSW, New South Wales University Press, 1981). Pp. 343. ISBN 0 86840 160 9.     

Managers Making Sense of Millennials: Perceptions of a Generational Cohort

The study of generational cohorts has seen an increase in popularity in scholarly and popular literature. Millennials comprise the newest cohort to enter the workplace. This study explores how managers use social categorization to make sense of their Millennial-generation employees. Data were collected through interviews conducted with managers in order to learn how they viewed and described Millennials. Twenty-five managers in the hospitality industry were interviewed. Data were analyzed by searching for membership categorization devices (MCDs), then patterns in usage and meaning of the devices were explored. Three patterns were identified in using MCDs to reference Millennials: “kids”, “age group,” and “Millennials”/variations of the term. These findings are examined in reference to how they may inform managerial behavior as well as guide further study of generational cohorts.     

Obscenity and fabrication in equity and widening participation methodologies

Equity and widening participation (EWP) initiatives in Australia are increasingly reimagined in policy as sites where participants are constructed as competitor-individuals, with education considered only in terms of employability, social mobility and nation-state market competition. In the context of EWP outreach, and with school students in particular, this can transpire into demands for narrow forms of ‘legitimate’ aspirations. Goffman defines obscenity as when (1) the very intimate is forced into the public sphere, while (2) the humanising dimensions or contexts are stripped away, with an example being pornography—where intimate encounters are reproduced as de-contextualised acts while being made public. This article argues that dominant approaches to practicing and evaluating EWP risk obscene consequences if they force community members to present static future-oriented valuations of intimate, fluid aspirations and experiences of education against a backdrop of increasingly individuated, competitive and standardised educational institutions. In this article, firstly we detail the context to establish a foundation for theorising consequences of particular socio-educational discursive practices. Secondly, we engage with notions of frame, keying and fabrication as a toolbox to reveal some of the unintended (obscene) dynamics risked via certain approaches to programmatic practice and evaluation. Thirdly, we review the diversity of approaches to evaluation (and their attendant debates), highlighting the importance of these debates and diversities, making a case against methodological imperialism.     

Social Support and Demographic Correlates of Acculturative Stress in International Students

A sample of 141 international students from different U.S. colleges completed surveys related to social support, demographic variables, and acculturative stress. Findings indicated that social support and English proficiency uniquely contribute to the variance in students' acculturative stress. Results also indicated that students who primarily socialized with non‐Americans and that students from Asian countries experienced more acculturative stress compared with other subgroups. Implications are discussed and suggestions for counseling practice are provided.     

Lessons from black-thicket jungle: What is feasible in village schools of disadvantaged areas?

Comparative examination of the national goals of education as presented by various developing countries shows such goals to be often abstract and overly idealistic: a long way from the harsh reality of most rural village schools. Drawing on the results of a lengthy field study in a disadvantaged area of Sri Lanka, this article discusses the matter of feasibility in the shadow of too high expectations. It is concluded that ambitious goals should be operationalized at a practicable level, and recommendations are put forward for feasible action. As a rigidly ordered system of schooling may be an inevitable stage in a progressive evolution of schooling types, patience is needed before criticizing schools which lack creative teaching and problem-solving approaches. It is emphasised that the most important raw materials of the educational system are abundantly present, i.e., human resources. Children are eager to learn; parents are potentially supportive and want education for the sake of learning as well as for jobs. And most importantly for the success of the schools, dedicated principals and teachers are present in unexpectedly high numbers considering the constraints they face. The importance of such educators is stressed, along with implications for selection, training and remuneration.

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Zusammenfassung Vergleichende Studien der staatlichen Bildungsziele, wie sie von verschiedenen Entwicklungsländern vorgelegt wurden, zeigen, daß solche Ziele oft abstrakt und allzu idealistisch und von der rauhen Wirklichkeit der meisten ländlichen Dorfschulen weit entfernt sind. Die Autorin diskutiert, indem sie sich auf die Ergebnisse einer umfangreichen Feldstudie in einem benachteiligten Gebiet Sri Lankas bezieht, die Frage der Durchführbarkeit im Schatten überhöhter Erwartungen. Sie kommt dabei zu dem Schluß, daß die hochgesteckten Ziele auf eine gangbare Ebene zugeschnitten werden müßten, und gibt Empfehlungen für durchführbare Maßnahmen. Da ein straff organisiertes Unterrichtssystem ein unvermeidliches Stadium in einer fortschreitenden Entwicklung von Unterrichtstypen sein kann, ist Geduld angebracht, bevor man Schulen kritisiert, denen es an kreativem Lehren und Ansätzen zur Problemlösung mangelt. Betont wird, daß die wichtigsten Rohstoffe des Bildungssystems in Überfluß vorhanden sind, z.B. der Reichtum an Menschen. Kinder sind lernbegierig, Eltern unterstützen sie unter Umständen und wünschen eine Ausbildung sowohl um des Lernens willen als auch im Hinblick auf einen Arbeitsplatz. Und es gibt, was für den Erfolg der Schulen von größter Wichtigkeit ist, eine unerwartet hohe Zahl von engagierten Direktoren und Lehrern, wenn man die Widrigkeiten bedenkt, mit denen sie zu kämpfen haben. Die Bedeutung solcher Erzieher wird hervorgehoben unter Berücksichtigung der Konsequenzen für deren Auswahl, Ausbildung und Vergütung.

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Résumé L'examen comparé des objectifs éducatifs nationaux présentés par divers pays en développement révèle qu'ils sont souvent abstraits et excessivement idéalistes — et par conséquent bien éloignés de la dure réalité de la plupart des écoles rurales. En s'appuyant sur les résultats d'une étude très longue menée sur le terrain dans une région désavantagée du Sri Lanka, le présent article examine la question de faisabilité à l'ombre de ces exigences exagérées. On conclut que les objectifs ambitieux devraient être réalisés au niveau pratique et des recommandations sont faites pour l'action possible. Du fait qu'un système d'éducation agencé strictement peut devenir la phase inévitable de l'évolution progressive de divers types d'éducation, il convient d'être patient avant de procéder à la critique des écoles où un enseignement créatif et des approches orientées vers la solution de problèmes font défaut. On souligne que les matières premières les plus importantes d'un système éducatif, à savoir les ressources humaines, sont abondantes. Les enfants sont désireux d'apprendre, les parents constituent un soutien potentiel et souhaitent une éducation en vue d'acquérir des connaissances et de trouver un emploi. Et ce qui est capital pour le succès des écoles, il existe un nombre inopinément élevé de directeurs et d'enseignants dévoués, compte tenu des contraintes auxquelles ils doivent faire face. On met en lumière l'importance de ces éducateurs ainsi que les implications pour leur sélection, leur formation et leur rémunération.

     

Transition time: Make it a time of learning for children

Young children spend much of their day in transition, passing from one place or activity to another. Caregivers can use this time for planned activities which reinforce learning.Betty Ruth Baker is Assistant Professor of Curriculum and Instruction and Director of Early Childhood Education at Baylor University in Waco, Texas.