As knowledge is the main resource of the knowledge age, we, as a society, need to understand what tools and skills can support development of this resource. A learner's personal epistemology affects knowledge work, making the assessment and understanding of learner's epistemologies and its impact on learning critical. Traditionally, entry into the world of knowledge creation has been available only after years of advanced study. However, in the knowledge age, entry into this world can be available at a much younger age. Knowledge building is a promising pedagogy that could be the key to opening this door. This design research study explored the effects of epistemological view on participation in two online courses (n=12, n=15). A pre- and post-essay was given to measure change in levels of epistemological understanding and use of justification, specifically dialectical reasoning. Directed learning logs were used to encourage and code metacognitive and epistemological thought. An indication of level of participation in online courses was produced using analytic tools underlying the online environment. Changes in specific aspects of epistemological understanding were identified. Results indicated that participants with a high participation rating in belief mode epistemology were more likely to use sophisticated justification, such as dialectical reflection. Additionally, these participants showed greater indication of metacognitive activity within the learning logs (when prompted and when not prompted), were more collaborative, and were more often rated as an evaluativist (the highest level of epistemological understanding in Kuhn et al's. model (2000)) in the post-essay. As anticipated, design mode epistemology---a primary indication of knowledge building---was underrepresented even in the highest levels of belief mode epistemology. Widespread change occurred in the acceptance of peers as sources of knowledge. This has significant implications for the practice of teaching. Participation patterns did not depend on number of graduate courses taken, number of previous online courses, nor previous familiarity with the course platform. Future research should explore whether learning logs can facilitate metacognition, encourage greater epistemological sophistication, and lead to augmented knowledge building.