Type of Document	Dissertation
Author	Ellis, Jennifer Tennille Pinder
Author's Email Address	jtpellis@gmail.com
URN	etd-10092009-162534
Title	Assessing the Development of High School Chemistry Students' Conceptual and Visual Understanding of Dimensional Analysis via Supplemental Use of a Proprietary Interactive Software Program
Degree	Doctor of Philosophy (Ph.D.)
Department	Educational Theory, Policy, & Practice
Advisory Committee	Advisor Name Title Wandersee, James Committee Chair Blanchard, Pamela Committee Member Cheek, Earl Committee Member Culross, Rita Committee Member Lou, Yiping Committee Member Shrum, Wesley Dean's Representative
Keywords	Conceptual Understanding Technology-Mediated Learning Visual Understanding Chemical Education Dimensional Analysis Human Constructivisim
Date of Defense	2009-09-21
Availability	unrestricted
Abstract This study was designed to evaluate the effects of the proprietary science education software, “Conversionoes,” on students' conceptual and visual understanding of dimensional analysis. The participants in the study were high school general chemistry students enrolled in two public high schools with different demographics (School A and School B) in the Chattanooga, Tennessee, metropolitan area. A mixed methods design was used in the data collection and analysis to provide a holistic view of the impact of the software on student learning, via a value-added design. The resulting qualitative and quantitative data indicated that the Conversionoes software enhanced the treatment groups’ conceptual and visual understanding of dimensional analysis. In fact, when all of the quantitative and qualitative data were viewed as a whole, the advantages of integrating Conversionoes into the general chemistry classroom appeared to have a positive impact on student conceptual and visual understanding of dimensional analysis. This was supported by the quantitative data, which indicated a significant difference between the overall pre-test and post-test scores of the treatment groups (n=14, t=-2.896, p=0.008). The treatment groups’ data were comprised of performance test results from Schools A and B. The descriptive statistics indicated that in general African-American students benefited the most from the software. African-American males had the highest increase in proficiency, 18%; followed by African-American females, 16%; White males, 10.22%; and White Females, 9.67%. With respect to gender, females had the highest increase in proficiency, 15.59%, males increased on average by 12.42%. More importantly the software elevated student performance in all of the ethnic groups and both genders, helping students make gains in their proficiency levels of dimensional analysis problem solving. The qualitative data also showed that most students valued their experiences using the Conversionoes software and claimed that it improved their knowledge of all aspects of dimensional analysis.
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