This book brings together contributions from the leaders of the language learning motivation field. The varied chapters demonstrate how Gardner's work remains integral to a diverse range of contemporary theoretical issues underlying the psychology of language, even today, 60 years after the publication of Gardner and Lambert's seminal 1959 paper. The chapters cover a wide selection of topics related to applied linguistics, second language acquisition, social psychology, sociology, methodology and historical issues. The book advances thinking on cutting-edge topics in these diverse areas, providing a wealth of information for both students and established scholars that show the continuing and future importance of Gardner and Lambert's ideas.