ZhaoHong Han is Associate Professor in Linguistics and Education at Teachers College, Columbia University. Her research interests lie broadly in second language learnability and second language teachability. She is the author of Fossilization in Adult Second Language Acquisition (2004) and editor/co-editor of a number of volumes on topics of second language process, second language reading, and fossilization. She was the recipient of the 2003 International TESOL Heinle and Heinle Distinguished Research Award.

Teresa Cadierno is Associate Professor at the Institute of Language of Communication, University of Southern Denmark. Her research interests include instructed second language acquisition, with special focus on the acquisition of grammar by L2 learners, L2 input processing and the role of formal instruction in L2 acquisition; and applied cognitive linguistics, especially the acquisition and teaching of L2 constructions for the expression of motion events, and the investigation of re-thinking for speaking processes in a foreign language.