ERIC Number: EJ1096834
Record Type: Journal
Publication Date: 2015-Jun
Abstractor: As Provided
A Model of How Different Biology Experts Explain Molecular and Cellular Mechanisms
Trujillo, Caleb M.; Anderson, Trevor R.; Pelaez, Nancy J.
CBE - Life Sciences Education, v14 n2 Article 20 Jun 2015
Constructing explanations is an essential skill for all science learners. The goal of this project was to model the key components of expert explanation of molecular and cellular mechanisms. As such, we asked: What is an appropriate model of the components of explanation used by biology experts to explain molecular and cellular mechanisms? Do explanations made by experts from different biology subdisciplines at a university support the validity of this model? Guided by the modeling framework of R. S. Justi and J. K. Gilbert, the validity of an initial model was tested by asking seven biologists to explain a molecular mechanism of their choice. Data were collected from interviews, artifacts, and drawings, and then subjected to thematic analysis. We found that biologists explained the specific activities and organization of entities of the mechanism. In addition, they contextualized explanations according to their biological and social significance; integrated explanations with methods, instruments, and measurements; and used analogies and narrated stories. The derived methods, analogies, context, and how themes informed the development of our final MACH model of mechanistic explanations. Future research will test the potential of the MACH model as a guiding framework for instruction to enhance the quality of student explanations.
Descriptors: Biology, Specialists, Science Instruction, Molecular Structure, Cytology, Models, Validity, Teaching Methods, Freehand Drawing, Figurative Language, Discourse Analysis, Semi Structured Interviews, Qualitative Research, College Faculty
American Society for Cell Biology. 8120 Woodmont Avenue Suite 750, Bethesda, MD 20814-2762. Tel: 301-347-9300; Fax: 301-347-9310; e-mail: firstname.lastname@example.org; Website: http://www.ascb.org
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Sponsor: National Science Foundation (NSF)
Authoring Institution: N/A
Grant or Contract Numbers: 0837229; 1346567