skip to main content


Title: Laboratory Courses with Guided-Inquiry Modules Improve Scientific Reasoning and Experimental Design Skills for the Least-Prepared Undergraduate Students
Past studies on the differential effects of active learning based on students’ prior preparation and knowledge have been mixed. The purpose of the present study was to ask whether students with different levels of prior preparation responded differently to laboratory courses in which a guided-inquiry module was implemented. In the first study, we assessed student scientific reasoning skills, and in the second we assessed student experimental design skills. In each course in which the studies were conducted, student gains were analyzed by pretest quartiles, a measure of their prior preparation. Overall, student scientific reasoning skills and experimental design skills did not improve pretest to posttest. However, when divided into quartiles based on pretest score within each course, students in the lowest quartile experienced significant gains in both studies. Despite the significant gains observed among students in the lowest quartile, significant posttest differences between lowest and highest quartiles were observed in both scientific reasoning skills and experimental design skills. Nonetheless, these findings suggest that courses with guided-inquiry laboratory activities can foster the development of basic scientific reasoning and experimental design skills for students who are least prepared across a range of course levels and institution types.  more » « less
Award ID(s):
1818458
NSF-PAR ID:
10106786
Author(s) / Creator(s):
; ;
Date Published:
Journal Name:
CBE—Life Sciences Education
Volume:
18
Issue:
1
ISSN:
1931-7913
Page Range / eLocation ID:
ar2
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. Abstract Background

    Continuous calls for reform in science education emphasize the need to provide science experiences in lower-division courses to improve the retention of STEM majors and to develop science literacy and STEM skills for all students. Open or authentic inquiry and undergraduate research are effective science experiences leading to multiple gains in student learning and development. Most inquiry-based learning activities, however, are implemented in laboratory classes and the majority of them are guided inquiries. Although course-based undergraduate research experiences have significantly expanded the reach of the traditional apprentice approach, it is still challenging to provide research experiences to nonmajors and in large introductory courses. We examined student learning through a web-based authentic inquiry project implemented in a high-enrollment introductory ecology course for over a decade.

    Results

    Results from 10 years of student self-assessment of learning showed that the authentic inquiry experiences were consistently associated with significant gains in self-perception of interest and understanding and skills of the scientific process for all students—both majors and nonmajors, both lower- and upper-division students, both women and men, and both URM and non-URM students. Student performance in evaluating the quality of an inquiry report, before and after the inquiry project, also showed significant learning gains for all students. The authentic inquiry experiences proved highly effective for lower-division students, nonmajors, and women and URM students, whose learning gains were similar to or greater than those of their counterparts. The authentic inquiry experiences were particularly helpful to students who were less prepared with regard to the ability to evaluate a scientific report and narrowed the performance gap.

    Conclusions

    These findings suggest that authentic inquiry experiences can serve as an effective approach for engaging students in high-enrollment, introductory science courses. They can facilitate development of science literacy and STEM skills of all students, skills that are critical to students’ personal and professional success and to informed engagement in civic life.

     
    more » « less
  2. Abstract Background Traditionally, doctoral student education in the biomedical sciences relies on didactic coursework to build a foundation of scientific knowledge and an apprenticeship model of training in the laboratory of an established investigator. Recent recommendations for revision of graduate training include the utilization of graduate student competencies to assess progress and the introduction of novel curricula focused on development of skills, rather than accumulation of facts. Evidence demonstrates that active learning approaches are effective. Several facets of active learning are components of problem-based learning (PBL), which is a teaching modality where student learning is self-directed toward solving problems in a relevant context. These concepts were combined and incorporated in creating a new introductory graduate course designed to develop scientific skills (student competencies) in matriculating doctoral students using a PBL format. Methods Evaluation of course effectiveness was measured using the principals of the Kirkpatrick Four Level Model of Evaluation. At the end of each course offering, students completed evaluation surveys on the course and instructors to assess their perceptions of training effectiveness. Pre- and post-tests assessing students’ proficiency in experimental design were used to measure student learning. Results The analysis of the outcomes of the course suggests the training is effective in improving experimental design. The course was well received by the students as measured by student evaluations (Kirkpatrick Model Level 1). Improved scores on post-tests indicate that the students learned from the experience (Kirkpatrick Model Level 2). A template is provided for the implementation of similar courses at other institutions. Conclusions This problem-based learning course appears effective in training newly matriculated graduate students in the required skills for designing experiments to test specific hypotheses, enhancing student preparation prior to initiation of their dissertation research. 
    more » « less
  3. Abstract

    While the traditional goals of undergraduate courses are often content-based, the development of career-readiness and professional skills, such as those listed by the National Association of Colleges and Employers, are increasingly recognized as important learning outcomes. As Mammalogy courses embrace more hands-on learning activities, they provide the opportunity to embed these professional skills, which are directly relevant to many careers in science. For example, many Mammalogy courses may include projects that incorporate experimental design and data analysis that focus on quantitative literacy, in addition to technical skills including small mammal trapping and handling, or preparing voucher specimens, that focus on problem-solving and attention to detail. Here, we review the professional skills that can be developed through a Mammalogy course and evaluate evidence-based approaches to build those skills into our courses. One approach, using Course-based Undergraduate Research Experiences (CUREs), provides opportunities for both student skill development and instructor research program development. Because they invite students to participate in authentic scientific inquiry—from study design and data collection, to analysis and reporting of results—students participating in CUREs reported significant gains in their comfort with several important professional skills, including conducting field procedures, formulating and analyzing data, normalizing failure, and attempting new procedures on their own. Finally, we review the literature to demonstrate how active learning approaches inherent in CUREs can help students to build familiarity with technologies and techniques for collecting and assessing data from wild mammal populations, as well as to build important professional skills such as teamwork, leadership, problem-solving, and written and oral communication.

     
    more » « less
  4. Course-based Undergraduate Research Experiences (CUREs) are an increasingly utilized model for exposing students to research. The lack of robust assessments is a major hurdle to wider adoption of CUREs. The Coronavirus Infectious Disease 2019 (COVID-19) pandemic necessitated a drastic shift of in-person courses to the online format. Using the Participant Perception Indicator (PPI) survey, we measured students’ self-reported changes in learning from such a biochemistry course at a large university in south Florida based on the Biochemistry Authentic Scientific Inquiry Lab (BASIL) model. By doing this, we were able to better understand the student-benefits of CUREs and how these benefits are affected by changes in learning modalities between two relevant semesters, i.e., winter and summer of 2020. Anticipated learning outcomes (ALOs) help partially fill the gap left by the loss of physical interaction in experimental procedures. Our analysis indicated that students learned more through bioinformatic experiments compared to their wet-lab counterparts. Using pre- and post- surveys, students reported that their experience and confidence gains lagged behind their knowledge gain of technique-based skills. Students are not as confident in their understanding of techniques when unable to perform those in the physical laboratory. Thus, despite extensive pursuit of the purpose and protocols of the experiments and techniques, neither their experience nor their confidence was on par with their knowledge. This study is one of the first examples demonstrating a quantitative student-learning assessment of a CURE in the science, technology, engineering, and mathematics (STEM) disciplines. The novel assessment strategies targeted to identify gaps in learning mastery could facilitate the adoption of CUREs, fostering opportunities for all undergraduate students to vital laboratory research experiences in STEM. 
    more » « less
  5. Contribution: A new operational definition of series connections is given based on elements belonging to the same two meshes, which is properly dual to the usual definition of parallel elements being connected to the same two nodes. Furthermore, computer-based exercises have been developed and tested to teach students about such connections in gateway linear circuits courses, using color coding of nodes and meshes as a pedagogical device. Background: Series and parallel connections are a crucial but difficult concept. Existing textbooks give them limited attention, resulting in later difficulties learning circuit analysis. Research Questions: RQ1: Can an improved definition of series elements aid student understanding and student satisfaction? RQ2: Can a computer-based ``game'' lead to effective mastery and student satisfaction at a wide range of institutions, including minority-serving ones? Methodology: Standard and new definitions were elaborated in a multiple-choice tutorial. A game was developed focusing on identifying series and parallel connections, with color coding of both nodes and meshes. Student learning was assessed over eight years using pretest and posttest in 14 varied institutions. Student opinions were assessed using several types of surveys. Findings: Strong learning gains were observed every semester from built-in pretest and posttest, with average scores of 28% and 87%, respectively. Large improvements were observed at every institution including five minority-serving ones. The posttest score is increased by a statistically significant amount after introducing the new definition of series elements. Students preferred the new definition of series and recommended its use, and very strongly endorsed color coding. 
    more » « less