Advances in science and technology has led to the rise of different issues in relation to human life and security as well as the environment. These issues also paved the way for the field of Bioethics with its principles aiming to uphold moral standards on these issues. This study aimed to test and modify the theoretical models of the factors influencing the conviction schemas of BS Biology Bioethics students of a state university toward bioethical issues. One hundred ten (110) undergraduate (...) students were pre-tested and post-tested for comprehension of Bioethics principles, moral disengagement, and convictions toward bioethical issues. Identified personal factors were also retrieved for testing. Results showed that the Bioethics course has increased the participants’ comprehension of Bioethics principles, moral disengagement, and convictions. Stepwise multiple regression results revealed that anxiety, extraversion, exposure to media, and moral disengagement can predict pre-convictions. On the other hand, only moral disengagement was found to predict post-convictions. Furthermore, moral disengagement can be predicted by convictions before the course while anxiety, openness to change, and convictions were the predictors after the course. The proposed theoretical model was for tested goodness of fit using Structural Equation Modeling (SEM) and acceptance was based on the model fit criteria. Since the proposed model was not found to fit the data, this was revised based on the results of multiple regression and correlation among exogenous variables. Three models were constructed and found to fit the data adequately. These models show the direct and indirect effects of personal factors and moral disengagement on convictions. The mediating effects of moral disengagement and convictions to each other were also shown. Findings further imply that the ability to understand the principles does not influence convictions, but rather moral disengagement has a greater influence on the said factor. Improving moral education by integrating Bioethics to the curriculum is recommended to further strengthen the moral judgement and reasoning of students. (shrink)