OER Knowledge CloudJournal ArticleWertz, Ruth E.H.Purzer, ŞenayWithin the distance education community, the Community of Inquiry (COI) framework is widely accepted as a framework to understand and design text-based learning environments. The framework includes three components: Cognitive Presence, Teaching Presence, and Social Presence. Recent work has proposed the addition of a fourth component, Learning Presence, which reflects students' selfregulation, and its role within the original framework. This study evaluated alternative structures of the COI framework to explain student perceptions of learning online. The study participants (n = 256) were graduate students from multiple institutions who had taken at least one fully online course as part of their degree requirements. Survey data were collected using a single Likert-scaled survey instrument. A two-phase, sequential research study was conducted. The first phase included a series of confirmatory factor analyses to evaluate the measurement models of the four COI constructs individually, followed by a model including all four constructs simultaneously. The second phase focused on testing three hypotheses that explore how the COI constructs relate and interact with one another, which included: 1) a simple explanatory model, 2) a mediator model, and 3) a moderator model. These models were evaluated using path analyses and hierarchical linear regression analyses. Findings indicated that the while Social Presence acted as a mediator between the other COI constructs when analyzed individually, mediation criteria were not met when all four constructs were included in the model simultaneously. In addition, Learning Presence did not have significant moderation effect in this study. Learning Presence was significantly related to the other COI constructs, but not in a way that was well explained by the three hypothesized models; therefore, a post-hoc model was proposed. This manuscript makes unique contributions to the study of online learning environments through the COI framework by introducing a comprehensive survey that includes Learning Presence indicators, producing evidence on the multidimensionality of the COI constructs, and the strong relationship between Learning Presence and Cognitive Presence.2021EnglishThe Internet and Higher EducationpreprintUnited States10.1016/j.iheduc.2021.100832yesLearning presencecommunity of inquiryStructural Equation ModelingUnited States