关键因素构建WPBL学习效果评价方法研究

Evaluation Method about the Learning Effect of Web-based PBL with Key Factors Simulation

目的采用关键因素构建WPBL学习效果综合评价模型并进行实证研究。方法从广州医学院开展WPBL教学模式的学生中随机抽取10%学生,发放调查问卷,利用聚类分析挑选评价变量。用因子分析法提取公因子,用公因子的方差贡献率作为综合评价模型的权重,并给出其对学习效果评价的合理解释。按关键因素构建出综合评价模型,开展综合评价。结果以特征值大于1为标准提取出四个公因子,方差累积贡献率达到64.99%。以方差贡献率作为综合评价函数的权重,构建出综合评价模型:E=K1+K2+K3+…+Kj(j=1,2,…,m)。利用综合评价模型对WPBL学习效果进行综合评价。结论采用关键因素构建综合评价模型评价WPBL学习效果是可行的。这些关键因素能从四个方面对WPBL学习效果进行量化。

Objective This paper aims to use components as the key factors to explore the feasibility of evaluation method about the learning effect of Web-based PBL. Dummy variables were introduced to solve the problem of multicollinearity between the variables. The variance contribution rate Used as weights to make an objective evaluation of teach- ing effective evaluation of WPBL learning effect. Methods We distribu- ted a questionnaire to 101 students of clinical bilingual class of 2007and 2008 grade in Guangzhou Medical University. Cranach＇s a coefficient is used to evaluate intrinsic consistency reliability of the questionnaire. Aver- age Between-groups linkage was used to hierarchical clustering. We applied principal component analysis to extract components and to explain compo- nents which were orthogonally rotated by varimax. Results The questionnaire＇s intrinsic consistency reliability Cranach＇s a coefficient is 0. 85. Four components are extracted with Eigen values greater than 1, the cumulative contribution rate is 64. 99%. Comprehensive evaluation model is expressed as：E=K1 ＋K2 ＋K3 ＋ … ＋Kj（j = 1,2,... ,m） Four compo- nents which are orthogonally rotated by varimax are interpreted as collective collaboration capabilities Self-learning and quest skills, clinical reasoning and problem-solving capabilities, memorizing and understanding of medical knowledge. And students＇ learning effect is well evaluated. Conclusion This paper demonstrates that using components as the key factors to simu- late and assessing the Web-based PBL learning effect is feasible,which as- sesses the Web-based PBL learning effect well from four different aspects.