Exploring proposition generating task (PGT) as a tool in assessing students' conceptual change on metabolism of biomolecules

• Main Author: Gacutan, Bernardita T.
• Format: text
• Language: English
• Published: Animo Repository 2008
• Subjects: Biomolecules; Metabolism; Concepts; Change (Psychology); Biology
• Online Access: https://animorepository.dlsu.edu.ph/etd_masteral/3462; https://animorepository.dlsu.edu.ph/context/etd_masteral/article/10300/viewcontent/CDTG004268_P.pdf
• Institution: De La Salle University

This study assessed student's conceptual change on metabolism of biomolecules using Proposition Generating Task (PGT). Undergraduate students (n=50) who were enrolled in Biochemistry class at Our Lady of Fatima University during the second semester of school year 2004-2005 were asked to write propositions about the relationship between glucose metabolism and fatty acid metabolism prior to instruction and after instruction to determine changes in their conceptions. The propositions generated by the students prior to instruction and after instruction of glucose metabolism were analyzed and given a score ranging between 0-4, where 4 is the highest. In the CTMB the computed Pearson’s value is 0.54 and the correlated t-test is 3.63 indicative of a significant relationship between the pre-test and the post-test. The study also explored the quality of conceptual changes that occurred as students work individually and in groups. Clinical interviews were also undertaken to ensure the validity of the results culled from PGT and CTMB. Results revealed that PGT can be used as a tool in determining the development of concepts among students. It was also found out that the proposition generated by students in groups were better than the propositions generated individually. It was further observed that the CTMB scores of the students differed significantly before and after instruction.