高中生“电离平衡”心智模型的研究

Research on High School Students’ Mental Models in Learning Ionization Balance

基于二阶段测试和半结构化访谈法对高中二年级学生"电离平衡"心智模型进行测评,发现学生建构了共计11种非科学心智模型,具体包括在"强弱电解质"中建构了平衡依据模型、水解依据模型、导电依据模型、成键依据模型,在"电离平衡的状态"中建构了静止模型、常数依据模型,在"电离平衡的移动"中建构了限度迷思模型、错误类比模型、缺失联结模型,在"电离平衡常数"中建构了K-Q迷思模型、能量影响模型。同时,结合试题和访谈内容对学生非科学心智模型的成因进行了初步探讨,提出了教学改进建议。

Based on the two-tier diagnostic tests and semi-structured interviews,the ionization balance mental model of the second-year high school students was evaluated.It was found that the students constructed a total of 11 non-scientific mental models,including the balance basis model,the hydrolysis basis model,the conductive basis model,and the keying basis model were constructed in the strong and weak electrolytes.The static model and the constant basis model were constructed in the ionization equilibrium state.The limit myth model and the error analog model were constructed in the movement of ionization equilibrium.The K-Q myth model and the energy impact model were constructed in the ionization equilibrium constant.At the same time,combined with the test questions and interview,the causes of the students’non-scientific mental models were discussed.Ultimately,the corresponding teaching suggestions were provided for teachers.