Interdisciplinary Perspectives on Im/politeness brings together the work of linguists, psychologists, neuroscientists, and second language experts in order to provide readers with a snapshot of the possibilities for studying im/politeness in the 21st century. The volume is organized along methodological lines in three parts each preceded by a brief introduction outlining the evolution and advantages and disadvantages of the relevant methodologies, while a specially commissioned epilogue places the volume in the field as a whole. Part I is dedicated to self-reporting studies, Part II covers observational studies, and Part III introduces experimental studies. A central goal of the present collection is to make a case for the relevance of all these types of data and of both quantitative and qualitative methodologies to the ongoing theoretical debates in the field of im/politeness.