This research is inspired by recent technological development in online language learning
in Vietnam. The main aim of this study was to investigate interpersonal interaction in an
online English language learning environment at a Vietnamese university. The key
aspects of interaction were explored including patterns, influencing factors and the
contribution of facilitated interactions to the learners’ English competence. A mixed
methods design guided the collection of the data. Salmon’s (2003) model of teaching and
learning online was adopted as the main theoretical framework to interpret the study
findings.