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81.
The objective of this project was to develop a multiple choice test of graphing skills appropriate for science students from grades seven through twelve. Skills associated with the construction and interpretation of line graphs were delineated, and nine objectives encompassing these skills were developed. Twenty-six items were then constructed to measure these objectives. To establish content validity, items and objectives were submitted to a panel of reviewers. The experts agreed over 94% of the time on assignment of items to objectives and 98% on the scoring of items. TOGS was first administered to 119 7th, 9th, and 11th graders. The reliability (KR-20) was 0.81. Poorly functioning items were rewritten based on the item difficulty and discrimination data. The revised version of the test was given to 377 7th through 12th grade students. Total scores ranged from 2 to 26 correct (X = 13.3, S.D. = 5.3). The reliability (KR-20) was 0.83 for all subjects and ranged from 0.71 for eighth graders to 0.88 for ninth graders. Point biserial correlations showed 24 of the 26 items above 0.30 with an average value of 0.43. It was concluded from this and other data that TOGS was a valid and reliable instrument for measuring graphing abilities. 相似文献
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世界杯女子佩剑决定性动作起动和时机距离值的准定量研究 总被引：2，自引：1，他引：1
为使佩剑研究可定量化,将技术类别划分为一单步和多单步对攻以及单纯进攻和单纯防守,通过录像解析数据对世界杯女子佩剑冠、亚、季军技术进行了定量和统计分析.结果显示,以身体重心水平速度为基准,参考录像表象分析,所确定决定性动作的起动时刻更客观有效可信,由此确定的时机距离较好地反映了运动员对进攻时机和进攻有机组合距离值的把握能力;双方的前脚间距是培养适宜时机距离感的重要指标,双方后脚间距离是诊断时机距离准确可靠的单选指标;对攻时,相对对手略微晚起动和缩小时机距离是女子佩剑优秀运动员的原则性特征技术. 相似文献
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The interviewing process provides a unique method for determining what children know, and it is an innovative addition to
a science methods course. Evidence for the effectiveness of the model is found in the comments of teachers. Their comments
indicate that through the experience they have learned to value the process and recognize the importance of many of the topics
included in the science methods course. Finally, most of the teachers reported their intentions to use the interviewing process
in their classrooms. It appears,therefore, that interviewing can be a valuable part of a science methods course. It is likely
that the interviewing process would also be useful if incorporated into other professional growth opportunities such as inservice
programs and professional conferences. 相似文献
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Danny Helman 《Teaching Statistics》2004,26(3):72-74
A lottery coincidence provides the background for discussing the assessment of probabilities and the definition of events. 相似文献
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