目的调查某高校医学研究生对医学统计学的态度以及统计学成绩的影响因素,为提高医学研究生对医学统计学的学习兴趣,提升教学效果提供可靠依据。方法本研究采用汉化版的统计学态度调查量表(survey of attitudes towards statistics-28,SA...目的调查某高校医学研究生对医学统计学的态度以及统计学成绩的影响因素,为提高医学研究生对医学统计学的学习兴趣,提升教学效果提供可靠依据。方法本研究采用汉化版的统计学态度调查量表(survey of attitudes towards statistics-28,SATS-28)测量医学研究生的统计学态度,通过自制问卷在线收集学生基础信息,通过学号关联期末成绩,采用有序logistic回归分析探讨成绩的影响因素。结果共有595名学生完成调查,量表情感维度得分为3.50(0.67),认知能力维度得分为3.50(0.67),价值判断维度得分为3.33(0.44),难度评价维度得分为2.71(0.86);学生的性别、年龄、专业、统计学基础是影响医学统计学成绩的主要因素;考试成绩仅与情感维度得分呈正相关关系,且为弱相关(rs=0.106,p=0.010)。结论该校医学研究生对医学统计学的学习积极性不高。教师在进行医学统计学教学时,应针对不同性别、年龄、专业、统计学基础的学生面临的学习障碍,积极进行教学改革,提升教学效果,同时加强对学生态度的引导。展开更多
With the goal of model fitting species abundance distribution patterns of the tree,shrub and herb layers of the natural Toona ciliata community in Xingdoushan Nature Reserve,Enshi Autonomous Prefecture,Hubei Province,...With the goal of model fitting species abundance distribution patterns of the tree,shrub and herb layers of the natural Toona ciliata community in Xingdoushan Nature Reserve,Enshi Autonomous Prefecture,Hubei Province,we used the data collected from the field survey and employed different ecological niche models.The models tested were the broken stick model(BSM),the overlapping niche model(ONM)and the niche preemption model(NPM),as well as three statistic models,the log-series distribution model(LSD),the log-normal distribution model(LND)and the Weibull distribution model(WDM).To determine the fitted model most suitable to each layer,the fitting effects were judged by criteria of the lowest value of Akaike Information Criterion(AIC),Chi-square and the K-S values with no significant difference(P>0.05)between the theoretical predictions and observed species abundance distribution values.The result showed:(1)The fitting suitability and goodness of fit of the tree,shrub and herb layers by using the three ecological niche models were ranked as:NPM>BSM>ONM.Of the three statistical models,by accepting the fitting results of the three layers,WDM was the best fitting model,followed by LND.By rejecting the fitting tests of the herb layer,LSD had the worst fitting effect.The goodness of the statistical models was ranked as:WDM>LND>LSD.In general,the statistical models had better fitting results than the ecological models.(2)T.ciliata was the dominant species of the tree layer.The species richness and diversity of the herb layer were much higher than those of either the tree layer or the shrub layer.The species richness and diversity of the shrub layer were slightly higher than those of the tree layer.The community evenness accorded to the following order:herb>shrub>tree.Considering the fitting results of the different layers,different ecological niche models or statistical models with optimal goodness of fit and ecological significance can be given priority to in studying the species abundance distribution patterns of T.ciliata communities.展开更多
文摘目的调查某高校医学研究生对医学统计学的态度以及统计学成绩的影响因素,为提高医学研究生对医学统计学的学习兴趣,提升教学效果提供可靠依据。方法本研究采用汉化版的统计学态度调查量表(survey of attitudes towards statistics-28,SATS-28)测量医学研究生的统计学态度,通过自制问卷在线收集学生基础信息,通过学号关联期末成绩,采用有序logistic回归分析探讨成绩的影响因素。结果共有595名学生完成调查,量表情感维度得分为3.50(0.67),认知能力维度得分为3.50(0.67),价值判断维度得分为3.33(0.44),难度评价维度得分为2.71(0.86);学生的性别、年龄、专业、统计学基础是影响医学统计学成绩的主要因素;考试成绩仅与情感维度得分呈正相关关系,且为弱相关(rs=0.106,p=0.010)。结论该校医学研究生对医学统计学的学习积极性不高。教师在进行医学统计学教学时,应针对不同性别、年龄、专业、统计学基础的学生面临的学习障碍,积极进行教学改革,提升教学效果,同时加强对学生态度的引导。
基金Public Welfare Research Project of Department of Science and Technology in Hubei Province(40 2012DBA40001)Scientific Research Project of Department of Education in Hubei Province(B20160555)
文摘With the goal of model fitting species abundance distribution patterns of the tree,shrub and herb layers of the natural Toona ciliata community in Xingdoushan Nature Reserve,Enshi Autonomous Prefecture,Hubei Province,we used the data collected from the field survey and employed different ecological niche models.The models tested were the broken stick model(BSM),the overlapping niche model(ONM)and the niche preemption model(NPM),as well as three statistic models,the log-series distribution model(LSD),the log-normal distribution model(LND)and the Weibull distribution model(WDM).To determine the fitted model most suitable to each layer,the fitting effects were judged by criteria of the lowest value of Akaike Information Criterion(AIC),Chi-square and the K-S values with no significant difference(P>0.05)between the theoretical predictions and observed species abundance distribution values.The result showed:(1)The fitting suitability and goodness of fit of the tree,shrub and herb layers by using the three ecological niche models were ranked as:NPM>BSM>ONM.Of the three statistical models,by accepting the fitting results of the three layers,WDM was the best fitting model,followed by LND.By rejecting the fitting tests of the herb layer,LSD had the worst fitting effect.The goodness of the statistical models was ranked as:WDM>LND>LSD.In general,the statistical models had better fitting results than the ecological models.(2)T.ciliata was the dominant species of the tree layer.The species richness and diversity of the herb layer were much higher than those of either the tree layer or the shrub layer.The species richness and diversity of the shrub layer were slightly higher than those of the tree layer.The community evenness accorded to the following order:herb>shrub>tree.Considering the fitting results of the different layers,different ecological niche models or statistical models with optimal goodness of fit and ecological significance can be given priority to in studying the species abundance distribution patterns of T.ciliata communities.
