This dissertation, "Fostering Collaborative Knowledge Building Through Reflective Assessment Among Chinese Tertiary Students" by Chunlin, Lei, 雷春林, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: This study examines the design, processes and instructional effects of principle-based, student-directed reflective assessments on students' conceptual understanding and collaborative inquiry in a computer-supported knowledge building environment. Premised on socio-constructivism, knowledge building and classroom learning theories, this study (1) designs a knowledge building environment, informed by knowledge building principles and reflective assessments, and evaluates its effects on students' conceptual understanding, approaches to learning, and conceptions of collaboration; (2) investigates the role of engagement in Knowledge Forum on students' conceptual understanding; (3) examines the role of portfolio assessment and other reflective assessment strategies in facilitating deep learning and knowledge building; and (4) characterizes the socio-cognitive dynamics of collaborative knowledge building. Participants of the study were 60 first-year Chinese tertiary students enrolled in a Sino-British joint educational program at a university in Shanghai, China. In a quasi-experimental design, one group of students experienced a knowledge building environment which was informed by knowledge building principles and highlighted concurrent, transformative assessment (reflective assessment strategies). The other group was exposed to a technology-based environment without the mediation of knowledge building principles. Multiple source of data were employed, including surveys, domain tests, academic performance assessments, Knowledge Forum engagement indices, e-portfolio notes, online inquiry threads, student classroom reflective presentations, and end-of-program interviews. Major findings include (1) students in the principle-based environment outperformed their peers in terms of conceptual understanding and deep approaches to learning; (2) student online participation and community connectedness increased over time, and contributed to students' conceptual understanding over and above their prior domain knowledge; (3) qualitative e-portfolio analyses identified different kinds of student reflection strategies that were correlated with academic performance; (4) analysis of online inquiry threads showed students' different levels of engagement with four knowledge building principles and suggested knowledge building might be manifested by meta-discourse; (5) Student reflective presentation and interview study further addressed the role of epistemic reflection and collective assessments in scaffolding collaborative knowledge building. This study addresses the problem of aligning social-constructivist theories of learning and assessment. Assessment takes on a new meaning of both assessing and scaffolding group learning and knowledge building. This study may advance current literature on how socio-cognitive principles and social-constructivist assessment can be designed and aligned with learning, collaboration and instruction to promote conceptual understanding and knowledge building. This study also has pedagogical implications for how computer-supported knowledge building inquiry can be designed in the context of 21st century Chinese tertiary classrooms. DOI: 10.5353/th_b5185946 Subjects: Group work in education