1. negotiated meaning
2. task-based
3. new model. negotiated routines: trigger, indicator, response, and reaction-response SCMC negotiated interaction in lexical acquisition

The results of the paired-groups experimental study proves "are interpreted as being supportive for the interactionist perspective on SLA, especially the importance of attention". The study focuses on the acquisition of lexical meaning through negotiated interaction on NNS-NNS synchronous CMC. Check into Long's Interaction Hypothesis.

The benefits of CMA in language learning: interactionist perspective.

"Researchers have found that cognitive interactionist and sociocultural SLA theories offer a means of interpreting prior research on CALL and suggest a point of departure for designing future studies of CALL activities that are based on human–computer interaction and computer-mediated communication."

Chapelle. C. A 2007. theories expand from interactionist to cognitive interactionist and sociocultural theory cognitive interactionist: Human-computer interaction. sociocultural: CMC (Computer-Mediated Communication)

Chapelle CA (2006) focus on the theory of interactionist SLA theory

The Interaction Approach and CMC (Bryan Smith): The Interaction Approach(IA) in second language acquisition studies suggests that there is a link between interaction and learning. This approach focuses on three major components of interaction — exposure (input), production (output), and feedback. Many CALL researchers have adopted this theoretical perspective in exploring the relationship between CMC and instructed second language acquisition, exploiting many of the argued affordances offered by this medium in relation to the key tenets of the IA. This paper will provide a conceptual overview of the IA and explore specifically how CALL researchers have sought to study SLA from this theoretical perspective. We will discuss several methodological hurdles facing researchers engaged in this type of research and will offer some suggested strategies for conducting sound SLA/CALL research from an IA.

the interaction approach overlaps with psycholinguistic approach under the cognitive theory