以概念演化樹探討跨年級學生演化概念之發展

Using a Conceptual Evolution Tree to Investigate the Development of Understanding of Evolution across Grade Levels

辛怡瑩(Yi-Ying Hsin) ； 邱美虹(Mei-Hung Chiu)

《科學教育學刊》 18卷2期 (2010/04) Pp. 131-153

https://doi.org/10.6173/CJSE.2010.1802.03

摘要

本研究以問卷調查跨年級學生演化概念之發展，對象有小六、國一、國二、高一、高二及大一，有效問卷共747份。演化概念分為四個主概念和六個次概念，結果顯示小學六年級學生易使用外在特徵解釋，經國一教學後比例下降。學生在選擇題與開放題的答題表現是中相關，開放題得分較選擇題低，與學生寫作表達能力有關。由概念演化樹可看出科學概念出現順序為主概念三「不同的存活率」、主概念一「個別變異」、主概念二「遺傳決定」，最後主概念四「累積世代的改變」。整體而言，跨年級學生發展逐年增長，但國一到國二有下降情況，主因為國二沒有演化課程，其餘階段皆有與演化相關課程，直到大一階段學生仍尚未建立完整的主概念四「累積世代的改變」。

關鍵字

演化 ； 概念改變 ； 概念演化樹

並列摘要

The purpose of this study was to investigate, across age levels, students' conceptions about evolution. The participants were from different grades, namely, 6(superscript th), 7(superscript th), 8(superscript th), 10(superscript th), 11(superscript th), and freshmen majoring in Life Science at several universities. Seven hundred forty-seven participants were involved in the study. Four major concepts of evolution were identified and then divided into six sub-conceptions of evolution respectively. The authors adopted the software PAUP(superscript *) 4.0 of phylogenetic systematics to find the goodness of fit of the conceptual evolutionary tree of students' conceptions about evolution. The results were as follows: First, most of the 6th graders tended to use external characteristics of the organism to explain the process of evolution. After instruction, the percentages of incorrect conceptions were lower than before. Second, the scores between multiple choice and open-ended questions were highly correlated. The students' scores on open-ended questions were lower than their performance on multiple choice questions. Third, the fittest conceptual evolutionary tree represented the developmental sequence of the students' conceptions of evolution: such as ”differential survival rates”, ”individual variation”, ”genetic determination”, and ”accumulation of changes over many generations.” In summary, the development of students' conceptions of evolution is a gradual process. ”Accumulation of changes over many generations” was not learned by the students until the first year at the university level.

並列關鍵字

Evolution ； Conceptual Change ； Conceptual Evolution Tree

參考文獻

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