Marsan Lynnsay A, D'Arcy Christina E, Olimpo Jeffrey T
Campus Office for Undergraduate Research Initiatives (COURI), The University of Texas at El Paso, El Paso, TX 79968.
Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968.
J Microbiol Biol Educ. 2016 Dec 2;17(3):436-443. doi: 10.1128/jmbe.v17i3.1137. eCollection 2016 Dec.
Evidence suggests that incorporating quantitative reasoning exercises into existent curricular frameworks within the science, technology, engineering, and mathematics (STEM) disciplines is essential for novices' development of conceptual understanding and process skills in these domains. Despite this being the case, such studies acknowledge that students often experience difficulty in applying mathematics in the context of scientific problems. To address this concern, the present study sought to explore the impact of active demonstrations and critical reading exercises on novices' comprehension of basic statistical concepts, including hypothesis testing, experimental design, and interpretation of research findings. Students first engaged in a highly interactive height activity that served to intuitively illustrate normal distribution, mean, standard deviation, and sample selection criteria. To enforce practical applications of standard deviation and -value, student teams were subsequently assigned a figure from a peer-reviewed primary research article and instructed to evaluate the trustworthiness of the data. At the conclusion of this exercise, students presented their evaluations to the class for open discussion and commentary. Quantitative assessment of pre- and post-module survey data indicated a statistically significant increase both in students' scientific reasoning and process skills and in their self-reported confidence in understanding the statistical concepts presented in the module. Furthermore, data indicated that the majority of students (>85%) found the module both interesting and helpful in nature. Future studies will seek to develop additional, novel exercises within this area and to evaluate the impact of such modules across a variety of STEM and non-STEM contexts.
有证据表明,将定量推理练习纳入科学、技术、工程和数学(STEM)学科现有的课程框架中,对于新手在这些领域发展概念理解和过程技能至关重要。尽管如此,此类研究承认,学生在将数学应用于科学问题的情境中时常常遇到困难。为了解决这一问题,本研究旨在探讨主动演示和批判性阅读练习对新手理解基本统计概念(包括假设检验、实验设计和研究结果解释)的影响。学生们首先参与了一项高度互动的身高活动,该活动直观地展示了正态分布、均值、标准差和样本选择标准。为了强化标准差和p值的实际应用,随后给学生小组分配了一篇同行评审的主要研究文章中的一个图表,并要求他们评估数据的可信度。在这项练习结束时,学生们向全班展示了他们的评估结果,以便进行公开讨论和评论。对模块前后调查数据的定量评估表明,学生的科学推理和过程技能以及他们自我报告的对理解模块中所呈现的统计概念的信心在统计学上均有显著提高。此外,数据表明,大多数学生(>85%)认为该模块既有趣又有帮助。未来的研究将寻求在这一领域开发更多新颖的练习,并评估此类模块在各种STEM和非STEM背景下的影响。