This volume investigates the multifaceted role of interaction in second language acquisition, honoring the foundational contributions of Susan M. Gass to the field. Editors Alison Mackey and Charlene Polio compile a series of scholarly chapters that examine how communicative exchanges facilitate linguistic development. The text synthesizes decades of research to provide a comprehensive overview of current theoretical frameworks and empirical findings in the study of interactional feedback and learner output.

Experts recognize this collection as a significant resource for graduate students and researchers specializing in applied linguistics. Readers frequently note the academic density of the prose, which serves as a rigorous examination of the evolution of interaction-based research.