Cardiorespiratory and muscular fitness associations with older adolescent cognitive control

Background:Participation in physical activity supports greater cardiorespiratory fitness(CRF),a correlate of cognitive control.However,the relationship between muscular fitness(MF)and cognitive control is less clear.The present study investigated the differential relationship of CRF and MF with cognitive control in older adolescents.Methods:This cross-sectional study involved students(15
17 years old,n=541,43%female)from 20 secondary schools who completed tests of inhibition(modified flanker task),working memory(n-back task),CRF(Progressive Aerobic Cardiovascular Endurance Run),and MF(standing long jump and push-up test).Multilevel analyses tested the association between CRF or MF and cognitive outcomes while accounting for the influence of the other fitness variable and relevant demographic factors.Results:CRF predicted response accuracy during incongruent flanker trials,the condition requiring greater inhibition.For the working memory task,CRF predicted greater target accuracy and greater d’scores on the 1-back task,requiring lesser amounts of working memory.In the 2-back task,which requires greater amounts of working memory,CRF also predicted greater target and non-target accuracy and d’scores.Comparatively,MF did not predict any cognitive outcomes after adjustment for CRF.Conclusion:CRF was selectively related to better performance during task conditions that require greater amounts of inhibition and working memory.This finding suggests that CRF,but not MF,may benefit cognitive control in older adolescents.This selective influence of CRF on older adolescents’cognition highlights the value of aerobic physical activity.     

Establishing the need for health communication research: best practices model for building transdisciplinary collaborations

The benefits of transdisciplinary collaboration for addressing complex health problems are widely accepted; however, acknowledging the bumps and twists along the road that are inherent in those collaborations is often considered taboo. Academic norms that prevent open discussion of these challenges can have counter-productive results. This essay describes the major education efforts, milestones, and footfalls in the development of an effective partnership between communication-trained researchers in a College of Journalism and Communications and medical researchers in a College of Medicine. We hope it can serve as “best practice” for understanding the value of team science and interdisciplinary research collaborations.     

The Superconducting Super Collider's Frontier Outpost, 1983–1988

In 1993, after an optimistic beginning followed by a half-decadeof conflict, the Superconducting Super Collider (SSC) project wasabandoned. In an era of `Big Science', a major scientificenterprise collapsed. Why? We employ the metaphor of the`frontier outpost' to analyse a critical moment in the history ofthis vastly expensive project, when the physicists who designedthe machine were forced to recognize that traditional post-warscientific values were no longer in harmony with governmentpriorities.     

Speaking of books

Clinical Experiences in Teaching for the Student Teacher or Intern. Edgar M. Tanruther. New York: Dodd, Mead, and Company, Inc., 1967, 297 pp. Paper $4.50.

Education in a Free Society: An American History. S. Alexander Rippa. New York: David McKay Company, Inc., 1967. 369 pp. $3.75.

Education of the Disadvantaged. A. Harry Passow, Miriam Goldberg, and. Abraham J. Tannenbaum, editors. New York: Holt, Rinehart and Winston, Inc., 1967. 497 pp. $7.95.

Programmed Teaching: A Symposium on Automation in Education. Revised edition. Joseph S. Roucek, editor. New York: Philosophical Library, 1965. x, 195 pp. $10.00.

The Friend of the Singing One, E. C. Foster and Slim Williams. Illustrated by Fermin Rocker. New York: Atheneum, 1967. 122 pp. $3.75.     

Early identification and interventions for students with mathematics difficulties

This article highlights key findings from the small body of research on mathematics difficulties (MD) relevant to early identification and early intervention. The research demonstrates that (a) for many children, mathematics difficulties are not stable over time; (b) the presence of reading difficulties seems related to slower progress in many aspects of mathematics; (c) almost all students with MD demonstrate problems with accurate and automatic retrieval of basic arithmetic combinations, such as 6 + 3. The following measures appear to be valid and reliable indicators of potential MD in kindergartners: (a) magnitude comparison (i.e., knowing which digit in a pair is larger), (b) sophistication of counting strategies, (c) fluent identification of numbers, and (d) working memory (as evidenced by reverse digit span). These are discussed in terms of the components of number sense. Implications for early intervention strategies are explored.     

Microtubules and morphogenesis in plants

Observations made by electron microscopy indicate that part of the machinery used by plants and animals to regulate their growth consists of sub-cellular structures termed microtubules. The system that organises the arrays of microtubules within each cell is therefore a crucial element in the chain of command that determines the pattern of development. Recent progress at this level of analysis is described here, with special reference to plants.     

Humanizing Instructional Videos in Physics: When Less Is More

Many instructors in science, technology, engineering, and mathematics fields are striving to create active learning environments in their classrooms and in doing so are frequently moving the lecture portion of their course into online video format. In this classroom-based study, we used a two group randomized experimental design to examine the efficacy of an instructional video that incorporates a human hand demonstrating and modeling how to solve frictional inclined plane problems compared to an identical video that did not include the human hand. The results show that the learners who viewed the video without the human hand present performed significantly better on a learning test and experienced a significantly better training efficiency than the learners who viewed the video with the human hand present. Meanwhile, those who learned with the human hand present in the instructional video rated the instructor as being more humanlike and engaging. The results have implications for both theory and practice. Implications for those designing instructional videos are discussed, as well as the limitations of the current study.     

Laboratory materials: Affordances or constraints?

Laboratory instruction is critical to the understanding of biology and is a central piece of biological sciences instruction. Although much investigation has focused on the content of biology laboratory exercises, we contend that understanding the extent to which the laboratory materials can aid or limit experimental investigation is of equal importance. In this study, therefore, we investigate the role of timing and availability of laboratory equipment in the context of two different laboratory exercises. We use both case study and an experimental approach to investigate how laboratory materials guide the planning, context, creativity, and timing of ideas shared among students. Our data support the notion that providing students with laboratory equipment before students plan and consider different experimental approaches can constrain students' ideas and encourage tool‐focused solutions to experimental design tasks. © 2011 Wiley Periodicals, Inc. J Res Sci Teach 48: 1010–1025, 2011