Development of this article was supported by the Fund for the Improvement of Postsecondary Education, United States Department of Education, Grant No. G00 a830 2727. The contents of this article do not necessarily reflect the position, policy, or endorsement of the Fund for the Improvement of Postsecondary Education.
Student conceptions of natural selection and its role in evolution†
Version of Record online: 18 AUG 2006
Copyright © 1990 Wiley Periodicals, Inc., A Wiley Company
Journal of Research in Science Teaching
Volume 27, Issue 5, pages 415–427, May 1990
How to Cite
Bishop, B. A. and Anderson, C. W. (1990), Student conceptions of natural selection and its role in evolution. J. Res. Sci. Teach., 27: 415–427. doi: 10.1002/tea.3660270503
- Issue online: 18 AUG 2006
- Version of Record online: 18 AUG 2006
- Manuscript Accepted: 23 JAN 1989
Pretests and posttests on the topic of evolution by natural selection were administered to students in a college nonmajors' biology course. Analysis of test responses revealed that most students understood evolution as a process in which species respond to environmental conditions by changing gradually over time. Student thinking differed from accepted biological theory in that (a) changes in traits were attributed to a need-driven adaptive process rather than random genetic mutation and sexual recombination, (b) no role was assigned to variation on traits within a population or differences in reproductive success, and (c) traits were seen as gradually changing in all members of a population. Although students had taken an average of 1.9 years of previous biology courses, performance on the pretest was uniformly low. There was no relationship between the amount of previous biology taken and either pretest or posttest performance. Belief in the truthfulness of evolutionary theory was also unrelated to either pretest or posttest performance. Course instruction using specially designed materials was moderately successful in improving students' understanding of the evolutionary process.