Evaluating the use of 3-D visualization in teaching molecular structure

Abstract

Visualization of molecular structure is a basic requirement for understanding the behavior of molecules, yet it is a difficult concept for chemistry instructors to teach, and for students to learn. Within the last few years advances in computer visualization have made it possible to represent molecular structure in a dynamic new way. 'Ibis study, involving approximately 350 introductory chemistry students, evaluated the contribution to student learning of molecular structure, of interacting with and viewing three-dimensional (3-D) computer visualizations of molecules. Half of the subjects viewed an eight-minute 3-D computer animation of a molecule in class, then manipulated 3-D molecules interactively on computers in the laboratory. The control group received no 3-D visualization computer-aided instruction. Comparison of exam results for the two groups showed the experimental group scored significantly higher on the molecular structure questions and the experimental group contained fewer low scores than the control group, suggesting a higher level of learning and comprehension among weaker students as well as better ones.