Differential Effects of a Multimedia Goal-Based Scenario to Teach Introductory Biochemistry—Who Benefits Most?

Abstract

This study investigated the relationship of cognitive and demographic variables to learning outcomes from a multimedia Goal-Based Scenario (GBS) lesson on DNA. The demographic variables under investigation were gender, ethnicity, prior science coursework in college and high school, final score in current chemistry course, and prior experience with computers. The cognitive variables under study were logical thinking ability, spatial ability, and disembedding ability. The subjects for this study were a total of 488 college students enrolled in introductory chemistry classes for nonmajors at one of four participating institutions in the United States and Canada. All subjects completed content pre- and posttests, a demographic questionnaire, and three cognitive tests: Test of Logical Thinking, Hidden Figures Test, and Purdue Visualization of Rotations Test. Students completed Whodunnit?, a multimedia GBS developed to teach basic biochemistry concepts pertaining to DNA. Logical thinking ability was the only cognitive variable to show a relationship with learning outcomes. There was no relationship between gender or ethnicity and academic outcomes. The number of science courses completed in high school was a significant predictor of academic outcomes. A relationship was observed between course rank and learning outcomes, as students with final course grades in the upper quartile of the sample scored significantly higher on the posttest than those in all other quartiles.