Paul Booth is a Senior Lecturer at Kingston University (London) and course leader for the MA in Applied Linguistics for TESOL. His publications include: L1 ? L2 semantic and syntactic processing: The influence of language proximity, System 78 and The variance of lexical diversity profiles and its relationship to learning style, IRAL 52.

Jon Clenton is an Associate Professor of Applied Linguistics at Hiroshima University. His publications include Testing the Revised Hierarchical Model: Evidence from word associations. Bilingualism: Language and Cognition, and Making sense of learner performance on tests of productive vocabulary knowledge. (with T. Fitzpatrick) TESOL Quarterly.