This text will be an essential volume for those interested in the interface between language, cognition, and behavior.Relevant for undergraduate and graduate students and scholars of psychology, education, linguistics, and cognitive science, this text will be an essential volume for those interested in the interface between language, cognition, and behavior. Contributions present new theoretical insights and empirical research, in addition to considering potential clinical and educational applications of scholarship on private speech.Relevant for undergraduate and graduate students and scholars of psychology, education, linguistics, and cognitive science, this text will be an essential volume for those interested in the interface between language, cognition, and behavior. Contributions present new theoretical insights and empirical research, in addition to considering potential clinical and educational applications of scholarship on private speech.Seventy-five years after Vygotskys death, scholarship exploring developmental relations between language and thought continues to be strong. This timely edited volume compiles contributions from international leaders in the field on the roles of language and private speech (self-talk) in the development of self-regulation and executive functioning in children and adults. New theoretical insights, empirical research, and potential clinical and educational applications of scholarship on private speech are presented. Relevant for undergraduate and graduate students and scholars of psychology, education, linguistics, and cognitive science, this text will be an essential volume for those interested in the interface between language, cognition, and behavior, and the development of regulatory or cognitive control over behavior.Preface Laura Berk; Introduction/Overview Adam Winsler, Charles Fernyhough and Ignacio Montero; Part I. Overview, Theoretical, and Biological Foundations: 1. Still talking to ourselves after all these yearl