Evaluating a Tutorial Program Containing Volunteer Subjects

Student teachers enrolled at Kansas State University and Northeastern State College (Oklahoma) in the spring of 1967 were compared on (1) maintenance of philosophic orientation, (2) adherence to teaching attitudes, (3) reaction to student-teaching, and (4) performance on related criteria. The GNC Scale of Logical Consistency in Educational Ideas determined their philosophic orientation. The Minnesota Teacher Attitude Inventory determined their attitudes toward potential teaching situations. Comparisons were made before and after student teaching by institution, teaching level, and sex. GNC, MTAI, and ACT levels, methods and student-teaching grades, and grade point averages were tested for intercorrelation.

K. S. U. students were more logically consistent and empirically oriented in their ideas about education before and after teaching participation. Teaching attitudes were best maintained by the elementary students in both institutions. N. S. C. students showed greater intercorrelation among all the criteria. Low logical consistency by N. S. C. students may signify disagreement between theoretical and practical educational views. Maintenance of teaching attitudes by K. S. U. elementary students suggests variable effects of professional courses. Agreement among academic and educational criteria by N. S. C. students suggests a greater unaminity of educational ends and means.     

Thinking skills: The question of generality

This paper examines the question of whether there are useful general thinking skills. It offers a working definition of 'thinking skill' and identifies ways in which this concept has been over-applied. Thinking skills, used across domains, are not inevitably weak as a result of the generality-power tradeoff. Admitting that thinking skills require domain-specific knowledge for their application, it is contended nonetheless that there are general thinking skills that involve substantial amounts of domain-independent knowledge. These skills usually address 'generic thinking tasks', common mental challenges that people face in many practical and intellectual endeavours, including the 'domain of practical affairs'. The educational implications of these findings are discussed.     

Book reviews

William J. Baker and James A. Rog (eds.), Sports and the Humanities: A Symposium (University of Maine, Orono, Maine, 1983), Pp.126. $8.95.

William J. Baker, Sports in the Western World. (Totowa, N.J., Rowan and Littlefield, 1982), Pp.viii + 360. $19.95 (hardback).

J. Bale, Sport and Place: A Geography of Sport in England, Scotland and Wales. (London, C. Hurst; Lincoln, University of Nebraska Press, 1982). Pp.187 £9.50.

J. A. Mangan, Athleticism in the Victorian and Edwardian Public School: the Emergence and Consolidation of an Educational Ideology. (Cambridge, Cambridge University Press, 1981). Pp.368. £28.

Beryl Furlong, Carnegie 1933–1983: College and School. (University of Liverpool, 1983). Pp.40. NP.

Gerald Redmond, The Sporting Scots of Nineteenth‐Century Canada. (London and Toronto, Associated University Presses, 1982). Pp.347. £16.50 (hardback).

Steven Tischler, Footballers and Businessmen (New York, Holmes and Meier, 1981). Pp.154.     

Isokinetic Leg Flexion and Extension Strength of Elite Adolescent Female Track and Field Athletes

Abstract

Sixty-two elite adolescent (age: 16.39 ± 1.62 yrs) female track and field athletes volunteered to be measured isokinetically for peak torque of the leg flexors and extensors. The sample included 16 throwers, 11 jumpers, 12 middle-distance runners (> 400 m), and 23 sprinters. A Cybex II isokinetic dynamometer was used to measure dominant leg strength at 180°/sec. One-way ANOVA revealed significant between group differences for absolute flexion and extension (Nm), extension/body weight (Nm/Kg), and extension/lean body weight (Nm/Kg). Scheffe post-hoc comparisons showed that, for absolute leg extension strength, throwers were stronger than middle-distance runners (by 54.4%), sprinters (35.6%), and jumpers (23.6%). For absolute leg flexion movements, throwers were stronger than middle distance runners (37.4%) and sprinters (32.1%). Jumpers had greater extension peak torque values than middle-distance runners relative to body weight (14.0%), and throwers were stronger than middle-distance runners for extension/lean body weight (14.9%)). No other comparisons were significant. However, when strength was expressed relative to body weight or lean body weight, there were few differences between events for flexion or extension. Given that absolute strength scores were correlated with body weight and lean body weight, peak torque/body weight or peak torque/lean body weight may be more sensitive than absolute values as indicators of underlying factors (such as training status or fiber type composition) responsible for the differences in muscular strength between groups.     

The Acute Response of the Immune System to Tennis Drills in Adolescent Athletes

ABSTRACT

Purpose: The purpose of this study was to examine changes in school-based physical education (PE) attendance over time among nationally representative samples of U.S. high school students and how changes in PE attendance have varied across demographic subgroups. Method: Student demographic information and PE attendance data were obtained from 13 biennial cycles (1991–2015) of the national Youth Risk Behavior Survey (YRBS). Physical education variables derived from YRBS data included PE attendance, daily PE, average PE days/week, and PE frequency. Logistic regression models examined trends in PE attendance, daily PE, and PE frequency for the overall sample and demographic subgroups. Linear regression models examined trends in average PE days/week in the overall sample only. Results: Overall, there was no significant change in the percentage of students reporting PE attendance during 1991 to 2015. However, daily PE and average PE days/week declined significantly from 1991 to 1995 (41.6% to 25.4% and 4.64 days to 3.64 days, respectively) and then remained stable through 2015 (29.8% and 4.11 days, respectively). The percentage of students reporting a PE frequency of 3 days per week increased significantly from 1991 to 1995 (1.5% to 19.0%) before stabilizing through 2015 (9.1%). Trends across demographic subgroups revealed notable differences in PE attendance. Conclusions: Study findings showed that U.S. schools have not substantially reduced PE amounts in recent years. Still, the prevalence of PE attendance among U.S. high school students is well below recommendations. For PE to contribute to increased adolescent compliance with national physical activity guidelines, significant policy actions are needed to improve PE access for all students.     

Comparing Measurement Error Between Two Different Methods of Measurement of Various Magnitudes

Measurement error is a common problem in several fields of research such as medicine, physiology, and exercise science. The standard deviation of repeated measurements on the same person is the measurement error. One way of presenting measurement error is called the repeatability, which is 2.77 multiplied by the within subject standard deviation. In this article, the two different repeatabilities obtained from two different protocols or “tests” are statistically compared. Briefly, the squared differences between protocols are natural log transformed to achieve normality and compared with a paired t-test. The natural log transformation guarantees that the squared differences follow a normal distribution. When more than two repeatabilities are compared from more than two protocols or “tests,” repeated-measures ANOVA comparing the log transformation of the squared differences is used. When comparing repeatabilities between protocols and between different magnitudes of measurement, repeated-measures ANOVA compares the natural log transformation of the squared differences between protocols and between different magnitudes of measurement.     

Accelerated hydrothermal degradation of fibres of Phormium tenax (New Zealand flax)

Solid-phase microextraction (SPME)–gas chromatography (GC)–mass spectrometry (MS) has been applied to the analysis of acetic acid and furfural that are emitted from the fibres of Phormium tenax (Xanthorrhoeaceae) [New Zealand flax] during degradation. Accelerated hydrothermal ageing of fibres of the Ruawai cultivar of P. tenax for 55 days at 70 °C resulted in the production of acetic acid at a level greater or equal to 1.65 mg g^–1 fibre. This corresponds to only 8.5% of the acetyl groups present in the fibres. These groups are an important source of acetic acid, which is capable of damaging the fibres. The rate of production of acetic acid suggests that a heritage object made from the fibres of P. tenax, that was stored in damp ambient conditions, would undergo significant deterioration after a relatively short period. Other volatile products released during ageing included furfural, a series of short to medium chain aliphatic aldehydes that were derived from the oxidation of long chain unsaturated fatty acids on the fibres and a small group of products that were derived from carotenoids. The levels of furfural were determined to be approximately 0.75% of the potential production but at these levels, furfural could contribute to unpleasant odours from unventilated items. Fibres from six cultivars of P. tenax were found to release acetic acid and furfural all at the same rate. The levels of acetic acid that can be generated from these fibres are sufficiently high that low moisture levels and continuous change of air is required to minimize degradation of cultural objects that are made from these fibres and displayed in museum halls.