International Journal of Research Studies in Language Learning 2014 April, Volume 3 Issue 2, 85-100 © The Authors / Attribution-NonCommercial-NoDerivs CC BY-NC-ND The impact of small group interaction on learners’ grammatical accuracy achievement Assia, Baghdadi University of M’sila, Algeria (assiabaghdadi1@live.fr) Said, Keskes University of Sétif, Algeria (keskaid@yahoo.fr) Received: 26 June 2013 Revised: 02 November 2013 Accepted: 04 November 2013 Available Online: 14 November 2013 DOI: 10.5861/ijrsll.2013.511 ISSN: 2243-7754 Online ISSN: 2243-7762 OPEN ACCESS Abstract In an attempt to investigate the impact of small group interaction on EFL learners’ grammatical accuracy achievement, methodological field experiments had been carried out with a sample of 30 students over a period of ten weeks of regular lectures in the Department of English, in one of the Algerian Universities. The obtained results indicated that learners’ interaction and cooperation had a positive effect on EFL learners’ achievement. And in order to scrutinise the existence and the frequency of the speech functions that might account for this effectiveness, a qualitative and a quantitative study had been conducted through the adoption of the Interaction Analysis Method. The results showed that within a cooperative learning context, factors such as the group size; the nature of the interaction; the learner’s role within the small group, and the type of the task-based grammatical structure had an influential effect on EFL learners’ grammar performance. Keywords: grammar learning; interaction analysis; small group; group dynamics; task-based activity