This is naturalistic theory of when, how and why our utterances are interpreted as speech acts: assertions, orders or promises.A central aspect of linguistic communication is that most of the time our utterances are automatically interpreted as speech acts; as assertions, conjectures, orders, requests and promises. This book provides an interdisciplinary theory of speech acts, couched in non-technical terms, which will appeal to linguists, philosophers, psychologists and cognitive scientists.A central aspect of linguistic communication is that most of the time our utterances are automatically interpreted as speech acts; as assertions, conjectures, orders, requests and promises. This book provides an interdisciplinary theory of speech acts, couched in non-technical terms, which will appeal to linguists, philosophers, psychologists and cognitive scientists.Most of the time our utterances are automatically interpreted as speech acts: as assertions, conjectures and testimonies; as orders, requests and pleas; as threats, offers and promises. Surprisingly, the cognitive correlates of this essential component of human communication have received little attention. This book fills the gap by providing a model of the psychological processes involved in interpreting and understanding speech acts. The theory is framed in naturalistic terms and is supported by data on language development and on autism spectrum disorders. Mikhail Kissine does not presuppose any specific background and addresses a crucial pragmatic phenomenon from an interdisciplinary perspective. This is a valuable resource for academic researchers and graduate and undergraduate students in pragmatics, semantics, cognitive linguistics, psycholinguistics and philosophy of language.Introduction; 1. Austin's distinctions revisited; 2. Intentional states and locutionary acts; 3. Constative speech acts; 4. Directive speech acts; 5. Speech acts, autism spectrum disorders and typical development; 6. Commissive speech al3+