Improving Understanding of Earth Science Topics through Evaluation and Plausibility Reappraisal

Friday 3:00pm-4:00pm Student Union: Ballroom B
Poster Session Part of Friday Session


Doug Lombardi, University of Maryland-College Park
Janelle Bailey, Temple University
Elliot S. Bickel, Temple University
Shondricka Burrell, Duquesne University
Evaluation is an important aspect of science and is receiving increasing attention in science education. This study investigated changes to high school students' plausibility judgments and knowledge as a result of a series of instructional activities that facilitated evaluation of scientific and alternative models in four different Earth science topics: (a) climate change, (b) fracking and earthquakes, (c) wetlands and land use, and (d) the formation of Earth's Moon. Repeated measure MANOVAs showed that participants shifted toward scientifically accepted explanations and increased their knowledge about these four Earth science topics after participating in the instructional activities. We also examined whether these evaluations mediated the relation between post instructional plausibility and knowledge. As shown by structural equation modeling, greater levels of evaluation significantly mediated plausibility shifts and knowledge increases. Effect sizes were small to large, depending upon topic and instructional context. Based on these results, the activities used in this study have the potential to facilitate students' critical thinking skills when evaluating the validity of explanations based on evidence, a scientific practice that is key to understanding Earth science.