This volume brings together papers from the areas of psychology, general linguistics, psycholinguistics, as well as from simultaneous interpreting. Their common focus is how theories and methodologies from various disciplines can be applied to the study of simultaneous interpreting, and also to suggest ways in which the study of simultaneous interpreting in its turn might contribute to knowledge in other areas. General topics dealt with include memory, language processing, bilingual processing, and second language acquisition. The articles more specifically focused on simultaneous interpreting discuss implications of the general topics and report on empirical studies on expertise in interpreting and on phonological interference in spoken language interpreting. Requirements for further interdisciplinary research in the context of simultaneous interpreting are considered.