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41.
We examined the factorial validity and factorial invariance of the 3-day physical activity recall (3DPAR) using confirmatory factor analysis. Adolescent girls from two cohorts (N = 955, N = 1,797) completed the 3DPAR in the eighth grade; participants in Cohort 2 (N = 1,658) completed the 3DPAR again 1 year later in the ninth grade. The 3DPAR was best represented by two uncorrelated factors in Cohort 1. The two-factor, uncorrelated measurement model exhibited evidence of cross-validity between Cohorts 1 and 2. This model also exhibited configural and partial metric invariance between race and across time. Hence, the 3DPAR consisted of two uncorrelated factors underlying three indicators of both moderate and vigorous physical activity in this sample of Black and White girls across a 1-year period. The 3DPAR can be used in cross-sectional, prospective cohort and intervention studies that examine mediators and moderators of physical activity among Black and White adolescent girls. 相似文献
42.
Dowda M Pate RR Felton GM Saunders R Ward DS Dishman RK Trost SG 《Research quarterly for exercise and sport》2004,75(4):352-360
The purposes of this study were to describe and compare the specific physical activity choices and sedentary pursuits of African American and Caucasian American girls. Participants were 1,124 African American and 1,068 Caucasian American eighth-grade students from 31 middle schools. The 3-Day Physical Activity Recall (3DPAR) was used to measure participation in physical activities and sedentary pursuits. The most frequently reported physical activities were walking, basketball, jogging or running, bicycling, and social dancing. Differences between groups were found in 11 physical activities and 3 sedentary pursuits. Participation rates were higher in African American girls (p < or = .001) for social dancing, basketball, watching television, and church attendance but lower in calisthenics, ballet and other dance, jogging or running, rollerblading, soccer, softball or baseball, using an exercise machine, swimming, and homework. Cultural differences of groups should be considered when planning interventions to promote physical activity. 相似文献
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Rod McCormick 《International journal for the advancement of counseling》1995,18(3):163-172
This paper focuses on one aspect of the author's Ph.D. dissertation which examined the facilitation of healing for First Nations people of British Columbia Canada. the research finding discussed in this paper is that the means and ends of counselling for First Nations people differ from those of the Western therapeutic approaches utilized by the majority culture in Canada. These differences are illustrated by the First Nations world view and the unique goals of healing for First Nations people. it is necessary for counsellors to be responsive to these goals if they are to be effective in working with Native people (Please note that the terms First Nations, Native, and Aboriginal are used interchangeably to refer to the same people). 相似文献
46.
W. Rod Dolmage 《Interchange》1993,24(3):323-328
The author offers a highly critical evaluation of the Zuker text, arguing that while the book does address significant legal issues in Canadian education, it is erratically organized, inconsistent, and confusing. Indeed, the author argues that the book represents a veritable compilation of problems which never should have escaped editorial scrutiny. 相似文献
47.
This paper describes a study which investigated 14 and 15 year old students' understanding of combustion in both England and Spain, and explores the effect of practical laboratory experience on students' understanding. The teaching and learning styles used with the students in the study were explored using questionnaires and interviews. The students' understanding of combustion was explored using a questionnaire. The responses of English and Spanish students are significantly different. The quality of the responses is explored in terms of the awareness of students of the involvement of gases in combustion, and it appears, however, that the more extensive use of practical work in English schools has had only a marginal effect on their understanding of combustion. 相似文献
48.
Rod Sims 《Distance Education》2003,24(1):87-103
The discourse of flexible and online learning echoes with terms such as communication, collaboration, engagement and interactivity. Of these, interactivity is frequently used to refer to an inherent quality of the medium and learning environment, with an underlying assumption that the interactive characteristics of communication with other learners or content objects is beneficial to the learning process. However, interactivity as a concept has received comparatively little research attention. To provide further insights into the dynamics of interactivity, this study reports on an investigation to ascertain the different ways people perceive interactivity, and the extent to which that interactivity adds value to the learning process. Based on a qualitative analysis of responses from 68 participants, it was found that participants indeed had specific expectations of interactivity that were not only consistent with theoretical frameworks of learning but also provided insights for the design of online collaborative learning environments. 相似文献
49.
Measurements are presented of drag and lift on new tennis balls in flight. Two video cameras were used to measure the velocity and height of the balls at two positions separated horizontally by 6.4 m. The balls were fired from a ball launcher at speeds between 15 and 30 m/s and with topspin or backspin at rates up to 2,500 rpm. Significant shot-to-shot variations were found in both the drag and lift coefficients. The average drag coefficient was 0.507 ± 0.024, independent of ball speed or spin, and lower than the value usually observed in wind tunnel experiments. The lift coefficient increased with ball spin, on average, but significant lift was observed even at very low spin. The latter effect can be attributed to a side force arising from asymmetries in the ball surface, analogous to the side force responsible for the erratic path of a knuckleball in baseball. 相似文献
50.
Peggy G. Kaczmarek Glenn Matlock Rod Merta Michael H. Ames Meredith Ross 《International journal for the advancement of counseling》1994,17(4):241-247
International students have realistic expectations about their adjustment to college, however, they seem to experience a more difficult transition than U.S. students. Scores on the Student Adaptation to College Questionnaire for international and U.S. students are compared. The results indicated that international students scored significantly lower on the social and the institutional attachment and goal commitment subscales. The Student Adaptation to College Questionnaire may have applications in targeting international student needs. 相似文献