Educational Assessment, Evaluation and Accountability - Most recent research on teacher evaluation examines evaluation’s measurement properties and accountability uses. Less research studies... 相似文献
Athens sits in a basin approximately 450 km2 in area, surrounded by mountains and open sea. Anthropogenic emissions in conjunction with the topographical and meteorological conditions can result in high air pollution within the city. The pollutants of concern for athletes competing in Athens 2004 appear to be nitrogen dioxide (NO2), ozone and particulate (PM10) pollution. Exposure to elevated ozone concentrations has been reported to give rise to symptoms that include cough, chest pain, difficulty in breathing, headache, eye irritation and a decrease in forced expiratory volume in one second. All of these effects are likely to impact upon performance, and several studies of cyclists suggest this to be the case. In contrast, the impact of ambient concentrations of NO2 appears to be negligible on normal activities, but at high exercise intensities the impact remains unclear. The use of currently available information and models to predict the effect of ozone and other pollutants on elite athletes is problematical, since such models are based upon significantly lower ventilation rates than those achieved by some elite athletes. In addition, it is already known that the response to ozone can vary somewhat between individuals. Since the individuals who will be competing in Athens are physiologically very different to the participants in most published studies, it is difficult to predict individual responses. There is some evidence to indicate that adaptation to the adverse health and performance effects of ozone can occur, so that performance is partially recovered on re-exposure. The adaptation is not seen in all studies and appears to be dependent on several factors, including the initial sensitivity of the individual to ozone. Antioxidant supplementation has also been shown in some studies to partially ameliorate the adverse effects of ozone by counteracting the oxidative stress mechanism associated with this pollutant. Whether this transfers to performance enhancement per se remains unclear at present. Additional research is required to gain a sound understanding of the effects of a complex mixed air pollution exposure on the pulmonary function and performance of athletes exercising at high work intensities. 相似文献
Although research has established the long-term damaging effects of incest, these efforts have suffered from the lack of valid, standardized assessment instruments. The present study reports on the construction and factor validation of the Response to Childhood Incest Questionnaire (RCIQ), a self-report instrument that assesses a range of commonly reported symptoms experienced by adult survivors of incest. A clinical population of 104 adult women who had experienced childhood or adolescent incest completed the RCIQ. A factor analysis of the RCIQ items revealed seven factors which corresponded to hypothesized stress response themes experienced by survivors of traumatic events. These factors include vulnerability and isolation, fear and anxiety, anger and betrayal, reaction to the abuser, sadness and loss, and powerlessness. In addition, four factors corresponded to the diagnostic criteria for post-traumatic stress disorder: intrusive thoughts, avoidance and intrusive emotions, detachment, and emotional control and numbness. The usefulness of the RCIQ as a pre- and post-treatment measure and the need for further research is discussed. 相似文献
Teacher evaluation’s relationship with instructional improvement is under-theorized in the literature. To address this gap, this paper uses a conceptual framework rooted in human, social, and material capital to analyze and synthesize findings from research conducted since 2009 on whether and under what conditions teacher evaluation stimulates change in teachers’ instruction. We find that teacher evaluation can facilitate instructional improvement if evaluators understand teaching and the teacher evaluation system and teachers and evaluators trust each other and have opportunities to develop social capital regarding instruction. In addition, adequate time and a userfriendly online data system appear to facilitate the use of teacher evaluation to stimulate changes in teachers’ practice. This paper thus presents a theoretical framework, rooted in theory and empirical research, that may prove useful to scholars and practitioners.
Despite growing momentum to overhaul teacher evaluation policies and practices, scant research examines how educators at the street level of such reform—principals and teachers—make sense of them, and almost no research examines the implications of current evaluation reforms for equity. This article provides findings based on a study of 14 districts implementing a new teacher evaluation policy in Connecticut. It focuses on how principals shaped teachers’ opportunities to learn about the new policy. We find that the majority of teachers’ opportunities to learn were formal and in whole group or one-on-one formats. We find important differences in the quantity and quality of learning opportunities at the district level, with districts serving greater shares of low-income students, students of color, and English language learners generally offering teachers fewer and lower quality opportunities to learn about the new reform than their counterparts. As such, this article builds on prior research illustrating the potential of new evaluation systems to exacerbate inequities and raises important cautions regarding the extent to which the unprecedented teacher evaluation reforms (currently underway) may exacerbate inequities among school districts. 相似文献
Athens sits in a basin approximately 450 km2 in area, surrounded by mountains and open sea. Anthropogenic emissions in conjunction with the topographical and meteorological conditions can result in high air pollution within the city. The pollutants of concern for athletes competing in Athens 2004 appear to be nitrogen dioxide (NO2), ozone and particulate (PM10) pollution. Exposure to elevated ozone concentrations has been reported to give rise to symptoms that include cough, chest pain, difficulty in breathing, headache, eye irritation and a decrease in forced expiratory volume in one second. All of these effects are likely to impact upon performance, and several studies of cyclists suggest this to be the case. In contrast, the impact of ambient concentrations of NO2 appears to be negligible on normal activities, but at high exercise intensities the impact remains unclear. The use of currently available information and models to predict the effect of ozone and other pollutants on elite athletes is problematical, since such models are based upon significantly lower ventilation rates than those achieved by some elite athletes. In addition, it is already known that the response to ozone can vary somewhat between individuals. Since the individuals who will be competing in Athens are physiologically very different to the participants in most published studies, it is difficult to predict individual responses. There is some evidence to indicate that adaptation to the adverse health and performance effects of ozone can occur, so that performance is partially recovered on re-exposure. The adaptation is not seen in all studies and appears to be dependent on several factors, including the initial sensitivity of the individual to ozone. Antioxidant supplementation has also been shown in some studies to partially ameliorate the adverse effects of ozone by counteracting the oxidative stress mechanism associated with this pollutant. Whether this transfers to performance enhancement per se remains unclear at present. Additional research is required to gain a sound understanding of the effects of a complex mixed air pollution exposure on the pulmonary function and performance of athletes exercising at high work intensities. 相似文献