Dayto, Darlene Shairah G.Almirol, Raven A.De Leon, Erika Nicole A.Deleña, Heather Lee F.Esteban, Keith Erinmei A.2025-09-032025-09-032024-12Dayto, D. G., Almirol, R. A., Almirol, R. A., De Leon, E. N. A., Deleña, H. L. F., Esteban, K. E. A. (2024). Perfectionism: Influence on Psychological well-being and academic achievement among senior high school students. [Unpublished Undergraduate Thesis]. Don Mariano Marcos Memorial State University. City of San Fernando, La Union. Lakasa ti Sirib, DMMMSU Institutional Respository.https://lakasa.dmmmsu.edu.ph/handle/123456789/305Full textPerfectionism can either be a bane or a boon to students, fostering great achievements or causing stress. This study explored the relationship between perfectionism and psychological well-being and academic achievement of Grade 12 senior high school students in DMMMSU-MLUC Laboratory High School. Using a descriptive correlational quantitative method approach, the total enumeration of the students answered the survey questionnaires on a modified Frost’s Multidimensional Perfectionism Scale and Ryff ’s Psychological Well-Being Scale. Analysis on median showed that all dimensions of FMPS and PWBS scored three (3), implying high perfectionism and high psychological well-being. The Kruskal-Wallis test for FMPS domains showed statistically significant differences in “Excessively High Personal Standards” across academic achievements; and PWBS between “Personal Growth” and academic tracks, and “Environmental Mastery” across academic achievements. The Spearman’s Rho showed a significant but weak positive relationship between perfectionism and psychological well-being. These findings entailed the importance of fostering healthy levels of perfectionism to enhance the students’ psychological well-being.enSOCIAL SCIENCES::Social sciences::PsychologyThesis