Journal Article Learner code-switching versus English only Get access Andrew Sampson Andrew Sampson Andrew Sampson has worked as a teacher, teacher trainer, Director of Studies, and Director in Ecuador, Colombia, and most recently, Spain. He is currently the Director of International House Palma, where he also leads the Cambridge Exams team and tutors CELTA courses. His research interests include the effects on second language acquisition of individual differences, corrective feedback, and learner use of L1 and L2 Search for other works by this author on: Oxford Academic Google Scholar ELT Journal, Volume 66, Issue 3, July 2012, Pages 293–303, https://doi.org/10.1093/elt/ccr067 Published: 03 November 2011