In recent years, more researchers have been assessing speaker interactional competence (IC), a concept that builds on earlier models of communicative competence. In contrast to earlier models of communication, IC more explicitly accounts for the co-constructed nature of talk. IC consists of interactive listening, topic development, dealing with communication breakdowns, inviting contributions, and responding accordingly (May et al., 2020). The roots of IC are conversation analysis (CA), a fine-grained and powerful form of analysis, but one that requires training and experience. As a result, there are currently few widely-used rubrics for assessing IC. In this presentation, I will describe how I created this rubric for assessing IC. As this research project is ongoing, I will examine some initial data in the form of audio recordings and transcripts, discuss some preliminary findings, and suggest possible improvements for future versions.