The relationship of estimated learning potential to performance on a learning task and achievement

The Estimated Learning Potential (ELP), a score obtained through the System of Multicultural Pluralistic Assessment (SOMPA), is purported to be a more appropriate index of potential for socioculturally different children. Prior studies have suggested a lower correlation with academic achievement than that of the traditional IQ score. The validity of the ELP has, therefore, been questioned. This study attempted to determine whether the ELP or IQ score would be the better predictor of performance on a learning task for 31 black and 32 white EMR children. The learning task was presented in a test-teach-test paradigm. Results suggest that the ELP did not correlate more highly with learning task performance than did the IQ score. However, the ELP may be more differentially sensitive to declassifying black children as retarded. The validity and the social consequences of the use of the IQ, ELP, and performance, after teaching, on the learning task for classification decisions also are discussed.     

Tackling reliability and construct validity: the systematic development of a qualitative protocol for skill and incident analysis

It is important to understand factors contributing to and directly causing sports injuries to improve the effectiveness and safety of sports skills. The characteristics of injury events must be evaluated and described meaningfully and reliably. However, many complex skills cannot be effectively investigated quantitatively because of ethical, technological and validity considerations. Increasingly, qualitative methods are being used to investigate human movement for research purposes, but there are concerns about reliability and measurement bias of such methods. Using the tackle in Rugby union as an example, we outline a systematic approach for developing a skill analysis protocol with a focus on improving objectivity, validity and reliability. Characteristics for analysis were selected using qualitative analysis and biomechanical theoretical models and epidemiological and coaching literature. An expert panel comprising subject matter experts provided feedback and the inter-rater reliability of the protocol was assessed using ten trained raters. The inter-rater reliability results were reviewed by the expert panel and the protocol was revised and assessed in a second inter-rater reliability study. Mean agreement in the second study improved and was comparable (52–90% agreement and ICC between 0.6 and 0.9) with other studies that have reported inter-rater reliability of qualitative analysis of human movement.     

Exercise does not increase salivary lymphocytes,monocytes, or granulocytes,but does increase salivary lysozyme

An increase in salivary leukocytes may contribute to the exercise-induced increase in salivary antimicrobial proteins (AMPs). However, exercise-induced changes in salivary leukocytes have not been studied. The purpose of the study was to describe salivary leukocyte changes with exercise. Participants (n = 11, 20.3 ± 0.8 years, 57.2 ± 7.6 ml kg^?1 min^?1 peak oxygen uptake ((VO) ?₂peak), 11.1 ± 3.9% body fat) ran for 45 min at 75% of VO_2peak. Stimulated saliva (12 mL) was collected pre- and immediately post exercise. Saliva was filtered through a 30 µm filter before analysis of leukocytes (CD45⁺), granulocytes (CD45⁺CD15⁺), monocytes (CD45⁺CD14⁺), T-cells (CD45⁺CD3⁺), and B-cells (CD45⁺CD20⁺) using flow cytometry. Saliva was analysed for Lysozyme (Lys) using ELISA. Exercise did not alter any leukocyte subset. The major constituent of leukocytes pre-exercise were granulocytes (57.9 ± 30.3% compared with monocytes: 5.1 ± 2.7%, T-cells: 17.1 ± 8.9%, B-cells: 12.1 ± 10.2%) (P < 0.05). In a subset of n = 6, Lys secretion rate increased after exercise (pre: 5,170 ± 5,215 ng/min; post: 7,639 ± 4,140 ng/min) (P < 0.05). Exercise does not result in increased granulocytes, but does increase Lys. Further, these data suggest that an increase in salivary leukocytes is not needed to increase Lys.     

Briging it all back home: some implications of recent science and technology studies for the classroom science teacher

In this paper, we support the validity of drawing from science studies to reshape science education. While true educational reform must involve alternative curricular structures, we stress that we do not propose here either a comprehensive curricular framework or a report on a pilot classroom project, as our research perspective comes from science studies rather than from education. Instead this paper is intended to encourage educators to draw from methodologies used in science studies to further their goals in education research and in classroom teaching. First, we examine theoretical connections and divergences between science studies and theories of education. Secondly, we discuss the benefits of teaching science as a social process and offer some suggestions that can be introduced by classroom teachers into pre-existing science curricula.     

A mathematical model of the oar blade - water interaction in rowing

Our aim was to present a mathematical model of rowing and sculling that allowed for a comparison of oar blade designs. The relative movement between the oar blades and water during the drive phase of the stroke was modelled, and the lift and drag forces generated by this complex interaction were determined. The model was driven by the oar shaft angular velocity about the oarlock in the horizontal plane, and was shown to be valid against measured on-water mean steady-state shell velocity for both a heavyweight men's eight and a lightweight men's single scull. Measured lift and drag force coefficients previously presented by the authors were used as inputs to the model, whichs allowed for the influence of oar blade design on rowing performance to be determined. The commonly used Big Blade, which is curved, and it's flat equivalent were compared, and blade curvature was shown to generate a 1.14% improvement in mean boat velocity, or a 17.1-m lead over 1500 m. With races being won and lost by much smaller margins than this, blade curvature would appear to play a significant role in propulsion.     

Guest Editorial: An Opinion on the Opinion—An Access Services Librarian's Perspective on the Georgia State Ruling

The authors examine, based on a survey of users, the e-reserve management software landscape. Library course reserve processing staff was surveyed to determine what management systems, if any, are being used and how effective they are in meeting the needs of the library, the faculty, and the students. Although there are many positive aspects to such systems, there are some shortcomings, which the authors discuss.     

Foreign and International Media

G. Stuart Adam's Journalism, Communication and the Law (Scarborough, Ontario: Prentice-Hall of Canada Ltd., 1976---price not given, paper)

T.J. Allard's The C.A.B. Story: 1926- 1976, Private Broadcasting in Canada (Ottawa: Canadian Association of Broadcasters, 1976---apparently free on request, paper)

Comptroller General of the United States, Suggestions to Improve Management of Radio Free Europe' Radio Liberty (Washington: General Accounting Office, 1976---either free or $1.00 depending on your classification (see 7:150), paper)

Television and the February 1974 General Election by Trevor Pateman (1974, 78 pp., $2.60)

Television News by Richard Collins (1976, 56 pp., $2.60)

Benno Signitzer's Regulation of Direct Broadcasting from Satellites (New York: Praeger Special Studies, 1976---$12.50)

Robert F. Amove (ed.) Educational Television: A Policy Critique and Guide for Developing Countries (New York: Praeger Special Studies, 1976---$15.00)

B.D. Dhawan's Economics of Television in India (New Delhi: S. Cahnd & Co. Ltd., 1974--Rs 35, current conversion to dollars not known but about $7.00)

Broadcasting in Asia and the Pacific (Philadelphia: Temple University Press/Heinemann Educational Books, 1977--$25.00/and a yet to be announced lower paperback price)

Guided Press in Southeast Asia: National Development vs. Freedom of Expression (Buffalo: SUNY at Buffalo Council on International Studies, Special Studies Series, 1976---price not yet announced)

Cultural Pluralism in Malaysia (Dekalb, III.: Northern Illinois University Center for Southeast Asian Studies, Special Report No. 14, 1976--price not yet announced)