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Education in different communication media takes place with functional differences that have consequences for the course of instructional interaction. In this paper, we examine instructional interaction among people using a computer-based electronic message system, contrasting it with conventional face-to-face discussion in a college level class. Interaction via the non-real time message system contained multiple “threads of discourse,” a higher proportion of student turns to teacher turns, and other deviations from the “initiation-response-evaluation” sequences usually found in face-to-face classroom interactions. Based on the results of our contrast, we describe ways to organize instruction using electronic message systems to take advantage of new properties and to avoid shortcomings of these new instructional media. 相似文献
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OBJECTIVE: Much research has been done to examine the long-term effects of being victimized by sexual, physical, and/or emotional abuse in childhood, but much less research has focused on the impact of childhood neglect experiences. This study examines the role that childhood neglect has on adult women's involvement in HIV-related risky behaviors. METHODS: The data come from a study of 250 "at risk" women living in the Atlanta, GA metropolitan area, most of whom were African American. Data were collected in face-to-face interviews between 1997 and 2000. Multiple regression was used to explore the relationship between childhood neglect experiences, self-esteem, attitudes toward condom use, and involvement in HIV-related risky behaviors. RESULTS: Overall, the model tested received strong support by the study data. Childhood neglect led to reduced self-esteem. Neglect was associated with worsened attitudes toward condom use and women who experienced childhood neglect also reported more involvement in HIV risk behaviors. CONCLUSIONS: HIV intervention programs ought to target women who have experienced childhood neglect, as neglect experiences have adverse impacts upon their self-esteem, condom-related attitudes, and HIV risk behavior practices in adulthood. 相似文献
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Henry Brown Brian Dawson Martyn J. Binnie Hugh Pinnington Marc Sim Tristan D. Clemons 《European Journal of Sport Science》2017,17(6):741-747
This study compared markers of muscle damage and inflammation elevated by a matched-intensity interval running session on soft sand and grass surfaces. In a counterbalanced, repeated-measures and crossover design, 10 well-trained female athletes completed 2 interval-based running sessions 1 week apart on either a grass or a sand surface. Exercise heart rate (HR) was fixed at 83–88% of HR maximum. Venous blood samples were collected pre-, post- and 24?h post-exercise, and analysed for myoglobin (Mb) and C-reactive protein (CRP). Perceptual ratings of exertion (RPE) and muscle soreness (DOMS) were recorded immediately post- and 24?h post-exercise. A significant time effect showed that Mb increased from pre- to post-exercise on grass (p?=?.008) but not on sand (p?=?.611). Furthermore, there was a greater relative increase in Mb on grass compared with that on sand (p?=?.026). No differences in CRP were reported between surfaces (p?>?.05). The HR, RPE and DOMS scores were not significantly different between conditions (p > .05). These results suggest that in response to a matched-intensity exercise bout, markers of post-exercise muscle damage may be reduced by running on softer ground surfaces. Such training strategy may be used to minimize musculoskeletal strain while still incurring an equivalent cardiovascular training stimulus. 相似文献
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Hugh C. Mitchell 《Journal of The Franklin Institute》1925,200(4):558-559