Educational technology consulting in developing countries     

Clayton R. Wright PhD 《TechTrends》1997,42(1):35-40

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2006 AECT Membership Salary Survey     

James A. Pershing CPT  PhD  Christopher D. Ryan  Nichole M. Harlin  Timothy D. Hammond 《TechTrends》2006,50(5):10-19

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Aerobic Capacity in Black Adolescent Girls     

James M. Pivarnik PhD  Janet E. Fulton  Wendell C. Taylor  Sharon A. Snider 《Research quarterly for exercise and sport》2013,84(2):202-207

Abstract

Our purpose was to determine the aerobic capacities (VO₂max) of a group of black female adolescents (age = 11.4 ? 15.8 years) randomly chosen from a single urban school. Of 91 girls selected, 64 performed an incremental treadmill running test to volitional exhaustion and achieved VO₂max as determined from expired gas measures. Other measures included height (m), weight (kg), and calf and triceps skinfolds (for % fat estimates). Girls were also asked whether they had achieved menarche. VO₂max averaged 37.3 ± 6.2 ml·kg^?1 ·min^?1 and was significantly correlated (r[62]) with height (?.32, p < .01), body mass index (?.63, p < .001), and % fat (?.65, p < .001) but not with age (?.16, p > .10). Postmenarchal girls were significantly taller and older than premenarchal girls. Contrary to previous studies, the girls' VO₂max values were not related to biological age. Our subjects' aerobic capacity values averaged 14% less than those of nonblack U.S. female adolescents previously reported in the literature. This difference in VO₂max was primarily a function of body weight. Study implications support the possibility that overweight in adult black women may originate prior to or during early adolescence. Future longitudinal studies should be designed to investigate the effects of aerobic fitness on cardiovascular risk factor reduction in black adolescent girls.  相似文献   

Physiological Responses to Maximal Treadmill and Handweighted Exercise     

David Shaun Bryant  Fredric L. Goss PhD  Robert J. Robertson  Kenneth F. Metz  David S. Feingold 《Research quarterly for exercise and sport》2013,84(3):300-304

Abstract

The purpose of this investigation was to compare the peak physiological responses among four protocols that employed different amounts of handweighted exercise in 16 males (aged 26.3 ± 4.1 years). The four protocols were (a) uphill treadmill running (UR; 3.36 m-s¹, 2.5% grade increase-3 min¹); (b) uphill treadmill walking while pumping 1.36kg handweights (HW) (UWHW; 1.79ms¹, 5.0% grade increase-3 min¹; (c) treadmill walking while pumping .91-kg HW (WHW; 1.79 m-s¹, 0% grade, .91kg HW increase-3 min¹); and (d) standing in place and pumping HW (SHW; arm work as described in WHW). It was hypothesized that the peak responses would be inversely proportional to the estimated muscle mass activated (i.e., UR = UWHW > WHW > SHW). Dependent variables included peak oxygen uptake (VO₂ peak), peak heart rate (HRpeak), peak ventilation (V_epeak), and peak respiratory exchange ratio (RERpeak). No differences were noted between UR and UWHW with respect to any of the dependent variables. All variables (except RERpeak) were greater (p < .01) in UR and UWHW than either WHW or SHW. RERpeak was greater (p < .01) in UR and UWHW than in WHW. VO₂peak and HRpeak were greater (p < .01) in WHW when compared to SHW. Mean VO₂peak was 97.5, 69.7, and 60% of UR for UWHW, WHW, and SHW, respectively. Therefore, walking and pumping handweights provides a maximal stimulus to the oxygen transport system.  相似文献   

The Validity of the Tritrac-R3D Activity Monitor for the Assessment of Physical Activity in Children     

Gregory J. Welk PhD  Charles B. Corbin 《Research quarterly for exercise and sport》2013,84(3):202-209

Abstract

The purpose of this study was to evaluate the validity of the Tritrac-R3D Activity Monitor, a new instrument designed to improve assessments of physical activity. Comparisons were made with a heart rate monitor and with a Caltrac Activity Monitor. Thirty-five children (ages 9–11 years) were monitored on 3 different school days with all 3 instruments. The Tritrac was moderately correlated with the heart rate monitor (r =.58) and highly correlated with the Caltrac monitor (r =.88). By taking advantage of the minute-by-minute timing capability of the Tritrac and the heart rate monitors, it was discovered, that the correlations between these instruments were highest during free play situations (lunch/recess, recess, after school) and were lower when activity was more limited (class time) or structured (physical education). The ability of the Tritrac to assess activity on a minute-by-minute basis may greatly enhance its overall utility.  相似文献   

Teaching within a Curricular Zone of Safety: School Culture and the Situated Nature of Student Teachers' Pedagogical Content Knowledge     

Inez Rovegno PhD 《Research quarterly for exercise and sport》2013,84(3):269-279

Abstract

The purpose of this paper is to continue the theoretical delineation of the nature of pedagogical content knowledge. Two student teachers were observed teaching an elementary games and high school sport unit and interviewed in depth about their lessons, biography, pedagogical content knowledge, and aspects of the school culture. Data were analyzed by constant comparison and analytic induction. Trustworthiness was established through member checks and triangulation. In the high school, both student teachers tried to use extending and refining tasks, as they had in the elementary school. But, when confronted with aspects of the high school culture, both retreated to a curricular zone of safety relying on application tasks. This zone, the defining aspect of their pedagogical content knowledge of teaching sports, emerged from and was constituted by the relations among goals, capabilities, teaching, inadequate pedagogical content knowledge, and aspects of the school culture. It is argued that situated and cultural orientations contribute to psychological orientations currently used to delineate pedagogical content knowledge. A curricular zone of safety is offered as a concept that helped account for the emergence and persistence of particular ways of knowing content.  相似文献   

Physiological Effects of Deep Water Running following a Land-Based Training Program     

Timothy J. Quinn PhD  Daniel R. Sedory  Brian S. Fisher 《Research quarterly for exercise and sport》2013,84(4):386-389

Abstract

The purpose of this study was to examine differences in knowledge representation and problem solutions in expert and novice youth baseball players. Ninety-four players in two age divisions, 7–8 years of age and 9–10 years of age, were assigned to three levels of expertise: high; average; and low skilled. Each subject participated in an interview session to elicit knowledge representation and solutions to five different defensive game situations. Interviews were transcribed and analyzed for content, solution to the problem, errors in problem solution, and qualitative trends. The frequency of advanced solutions to each of the five situations were analyzed in separate chi-square tests for age and expertise. Differences among the levels of expertise were found for the accuracy of solutions to three complex situations. Age was significant for only one situation. Patterns of knowledge content accessed during advanced and less advanced responses indicated both experts and novices were in a beginning stage of developing baseball knowledge structures. Errors in problem solutions indicated children had difficulty monitoring critical conditions and making correct inferences. Players' and teammates' ability to execute baseball skills seemed to influence the content and structure of tactical knowledge accessed during problem solution.  相似文献   

The use of computers in K-12 schools in turkey     

Buket Akkoyunlu Dr.  MA  PhD in Educational Technology  Feza Orhan Dr.  MA  PhD in Curriculum  Instruction 《TechTrends》2001,45(6):29-31

Through the determined efforts of MONE, more than one third of the existing 5,851 schools have at least one computer lab. It is clear that the number of computers in schools in Turkey will continue to increase.  相似文献   

The ecology of role play: Intentionality and cultural evolution     

Marianna Papadopoulou 《British Educational Research Journal》2012,38(4):575-592

This study examines the evolutionary function of children's pretence. The everyday, cultural environment that children engage with is of a highly complex structure. Human adaptation, thus, becomes, by analogy, an equally complex process that requires the development of life skills. Whilst in role play children engage in ‘mimesis’ and recreate the ecology of their world in order to gradually appropriate its structures. Role play enables them to create their group cultures, through which they communally explore and assign meaning to their worlds and themselves in it. The research took place in a Greek state school and employed participant and non‐participant observation of the children's role play sessions. The findings, grouped under four thematic categories, may reflect the players’ adaptation and evolutionary processes but also the expression of their deeply rooted, existential concerns at that particular stage of their development.  相似文献   

Erstad,Ola (2013) Digital learning lives Peter Lang (New York & Bern) isbn 978‐1‐4331‐1163‐1 280 pp € 30.75 (paper and e‐book) http://www.peterlang.com/index.cfm?event=cmp.ccc.seitenstruktur.detailseiten&seitentyp=produkt&pk=78334&cid=448     

Gi‐Zen Liu PhD 《British journal of educational technology : journal of the Council for Educational Technology》2014,45(3):E14-E15

Digital learning lives aims to describe a set of practices in school education and beyond that are well developed and based on digital technology. With rich examples from our digital lives, the author shows that digital natives should be able to go beyond spaces and places with which they are familiar. People closely interested in broadening the scope of digital learning and creativity should think of buying this. Gi‐Zen Liu  相似文献