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31.
Opportunities to read and analyze others?? writing or to observe readers as they analyze writing might enhance one??s own sense of audience and improve one??s own writing. This mixed-methods study investigated whether reader and observer activities in comparison to writing practice activities affected fifth-grade students?? persuasive writing and revising. After writing a first draft of a persuasive letter, 87 fifth-grade students were randomly assigned to one of three conditions: being a reader, observing readers, or practicing writing. The reader group read and discussed three persuasive letters, considering whether they were persuasive and why and selecting the most persuasive. The observer group listened to the reader group??s discussions and took notes; then they had their own discussion to generate a list of criteria for what made the letters persuasive. The practice-writing control group practiced writing persuasive letters. Afterwards, all groups revised their first drafts. The reader group produced second drafts that were of better quality and contained more evidence of audience awareness than the control group. The observer group did not differ from either group. The groups did not differ on a transfer task occurring 1-week later. The authors discuss implications for designing writing curriculums that utilize reader and observer activities.  相似文献   
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Abstract

This study examined the impact of rater agreement on decisions concerning the alignment between the Golden State Examination in High School Mathematics (California Department of Education, 2001a Academic Senate of the California State University. 1997. Statement on competencies in mathematics expected of entering college students Sacramento, CA: Author.  [Google Scholar]) and the University of California (UC) Statement on Competencies in Mathematics Expected of Entering College Students (Academic Senate of the California State University, 1997 Academic Senate of the California State University. 1997. Statement on competencies in mathematics expected of entering college students Sacramento, CA: Author.  [Google Scholar]). The UC faculty and high school mathematics teachers (N = 20) rated the mathematics items of the Golden State Examination relative to the expectations identified in the UC competency statement, identifying item features related to content and dimensionality. Raters assigned values for a primary topic, a secondary topic, item/topic centrality, and depth of knowledge. Agreement within these criteria was the basis of the assessment of alignment. Results showed considerable variability in judgments across raters and different pictures of alignment depending on the particular subset of raters providing the ratings. A few differences emerged between rater types.  相似文献   
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Reaction time, fractionated reaction time (premotor and motor time), and movement time were recorded during performance of a rapid aiming movement (11 mm in amplitude) to a circular target. Independent variables were target diameter (2 or 64 mm) and reaction time condition (simple or choice). Fifty-two subjects performed 16 practice and 24 performance trials under one of four possible experimental combinations (13 subjects per combination) in a 2 × 2 design. Reaction time correlated highly with premotor time (r = .99) but not with motor time (r = .31). Choice reaction time and its premotor time component were dependent upon target diameter, but simple reaction time and its premotor time component were not. However, choice and simple motor time were not differentially affected by target diameter. As expected, movement time was longer for the small target than for the large target. Taken together, the reaction time results were interpreted as support for Klapp's (1975) hypothesis that increases in choice reaction time for rapid movements to a small target are due to increases in the time needed for programing the response.  相似文献   
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This study examined performers' retrospective explanations of the relationship between anxiety symptoms, self-confidence, and performance. Interviews were used to determine how the presence of symptoms and the accompanying directional interpretation affected performance in six elite and six subelite swimmers. Causal networks revealed that perceived control was the moderatingfactor in the directional interpretation of anxiety and not the experience of anxiety symptoms alone. Symptoms perceived to be under control were interpreted to have facilitative consequences for performance; however, symptoms not under control were viewed as debilitative. Increases or decreases in self-confidence wereperceived to improve or lower performance. Findings reveal how cognitive and somatic information was processed, what strategies were adopted, and how this series of events related to performance.  相似文献   
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Grouping children of different ages in the same preschool classroom (i.e., mixed age) is widespread, but the evidence supporting this practice is mixed. A factor that may play a role in the relation between classroom age composition and child outcomes is peer skill. This study used a sample of 6,338 preschoolers (ages 3–5) to examine the influence of both classroom age composition and peer skill on children’s behavioral and language outcomes. Results supported the growing literature indicating preschoolers’ skills are higher when peer skill is higher, but differences related to classroom age composition were not found. These findings further support the view that peer skill plays an important role in preschool children’s outcomes.  相似文献   
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ABSTRACT

The primary purpose of the current study was to develop a theoretical model regarding nostalgia, self-continuity, pride, and the intention to visit a sport team's hometown and examine the moderating effect of length of time as a sport fan. The study involved showing a short nostalgic video clip and investigated relationships using structural equation modeling (SEM) and multigroup SEM. The results suggest that self-continuity is an important indicator of the relationship between nostalgia and pride and enhances the intention to visit a sport team's hometown. The results also showed that self-continuity is an important indicator for new fans but not for long-term fans.  相似文献   
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This study was undertaken to isolate and characterize the protease activity of human eye lens sample of mature and hyper mature cataract. Samples were collected just after surgery of the cataract lens and were stored at -20°C. The total protein extract was isolated from 5 samples in each case (mature and hyper mature cataract) and clear supernatant obtained after centrifugation was used as an enzyme source. The optimum pH for the proteases of mature cataract was 7.5 while the proteases of hyper mature cataract were recorded for maximum activity at pH 5.5 and 7.5. The optimum temperature for both enzyme sources was 50 °C. Effect of different metal ions such as potassium, lead, silver, zinc and borate was studied. In each case protease activity was increased. Reducing agent e.g. β mercaptoethanol also caused an increase in activity indicating the involvement of sulfhydryl groups. Protease activity was also located on agar plates.  相似文献   
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