職前化學教師自發性類比之探討

The Investigation of Self-generated Analogies for Pre-service Chemistry Teachers

陳雅君(Ya-Chun Chun)

《科學教育學刊》 15卷3期 (2007/06) Pp. 265-294

https://doi.org/10.6173/CJSE.2007.1503.04

摘要

本研究旨在探討不同學習成就的職前化學教師自發性類比品質之差異，及其在小組討論前後自發性類比修正之情形。自發性類比測驗卷內容共分為六個開放式問答題，分為「電化電池」及「濃差電池」兩個主題，「電化電池」部分包含(1)鹽橋功能(2)內部各種離子移動路徑(3)電子流的流動方向等三個子題；「濃差電池」部分則包含(1)整個系統反應方向及電子流的流動方向(2)內部各種離子移動路徑(3)反應前、後熵(entropy)的變化等三個子題。研究結果顯示：（一）目標概念的複雜程度及受試者的先備知識可能是造成不同學習成就的職前化學教師自發性類比品質差異之原因。（二）透過小組討論有助於職前化學教師發現舊類比缺點、增進對目標概念的了解及促進類比物精緻化，進而提昇其自發性類比之品質。（三）透過反思有助於職前化學教師省察到舊類比的缺失，進而促進自發性類比品質的改進。（四）職前化學教師自發性類比品質與概念圖的得分呈現顯著的相關，顯示擁有較複雜、整合知識架構者，較能產生有效的類比遷移，其自發性類比品質較佳。

關鍵字

反思能力 ； 自發性類比 ； 概念圖 ； 職前化學教師

並列摘要

The purposes of this study were to investigate the quality differences of self-generated analogies among pre-service chemistry teachers with different academic achievement. The content of self-generated analogies were induced from six open-ended questions classified as two parts, ”Electrochemical Cells” and ”Concentration Cells”. The questions in ”Electrochemical Cells” were ”functions of salt bridges”, ”ions' movement paths”, and ”electron movement path”, and the questions in the second part were ”reaction direction and electron movement path”, ”ions' movement paths”, and ”the change of entropy before and after reaction”.
The test results of thirty-four pre-service chemistry teachers uncovered the following findings:
1. The differences of quality of self-generated analogies might resulted from complexities of target concepts, prior knowledge, and pedagogical content knowledge of participants.
2. The quality of self-generated analogies could be promoted by group discussion, because it served as scaffold for pre-service chemistry teachers to aware the deficiencies of his own analogies, understand more about target concepts, and elaborate upon analogies.
3. There was a significant relationship between the pre-service teachers' reflective ability and the quality of self-generated analogy. It indicated that reflection could scout the deficiencies of analogies and then upgrade the qualities of self-generated analogies.
4. There was a significant relationship among the scores of concept maps and the qualities of self-generated analogies. It indicated that pre-service chemistry teachers with completed and integrated knowledge structures had more effective analogical mapping.

並列關鍵字

Concept Map ； Pre-service Teacher ； Reflective Thinking ； Self-generated Analogies

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