Department of Biology Teaching and Learning, University of Minnesota, Minneapolis, Minnesota, United States of America.
STEM Education Center, University of Minnesota, St. Paul, Minnesota, United States of America.
PLoS One. 2020 Jul 20;15(7):e0236098. doi: 10.1371/journal.pone.0236098. eCollection 2020.
Variation is an important concept that underlies experimental design and data analysis. Incomplete understanding of variation can preclude students from designing experiments that adequately manage organismal and experimental variation, and from accurately conducting and interpreting statistical analyses of data. Because of the lack of assessment instruments that measure students' ideas about variation in the context of biological investigations, we developed the Biological Variation in Experimental Design and Analysis (BioVEDA) assessment. Psychometric analyses indicate that BioVEDA assessment scores are reliable/precise. We provide evidence that the BioVEDA instrument can be used to evaluate students' understanding of biological variation in the context of experimental design and analysis relative to other students and to their prior scores.
变异性是一个重要的概念，它是实验设计和数据分析的基础。如果不能完全理解变异性，学生就无法设计出能充分控制生物和实验变异性的实验，也无法准确进行和解释数据的统计分析。由于缺乏评估工具来衡量学生在生物研究背景下对变异性的看法，我们开发了生物实验设计和分析中的变异性评估（BioVEDA）。心理测量学分析表明，BioVEDA 评估分数是可靠/精确的。我们提供的证据表明，BioVEDA 工具可以用于评估学生在实验设计和分析背景下对生物变异性的理解，与其他学生和他们之前的分数相比。
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