In the past before improving technologies allowed for the direct observation of brain activity, brain damaged patients were a prime avenue for understanding language structure and inferring back to brain function. Now with the rapid developments in neuroscience, what has been discovered about the brain can inform our view of language allowing us to build hypotheses about the role particular brain regions perform in language use. Brain damaged patients thus become populations which serve as test cases. While technologies in neuroscience have improved, so has our understanding and techniques for observing and analyzing social and communicative behavior. FTD patients have right hemisphere, frontal and temporal pole atrophy which leaves their cognitive abilities intact, but their social interactions impaired and their personalities changed. The description of FTD as a pathological change in social behavior provides the motivation in this volume to apply ethnomethodological and conversation analytic approaches to the organization of patients' interactions. These approaches do more than document the disease and its effects on loved ones by revealing phenomena that can be analyzed empirically as causing systematic changes in the patients' social interactions. This volume opens with a discussion of the frontal lobes and their expected involvement in language use and social interaction. Several chapters then use conversation analysis to examine a range of FTD social behaviors in real-world interactions both in and outside of the clinic. The remaining chapters show how the ethnomethodological approach applied throughout the book can be helpful in better understanding the neurobiology of discourse, the process of socialization, and the role of social motives and moral emotions in maintaining relationships.

In the past before improving technologies allowed for the direct observation of brain activity, brain damaged patients were a prime avenue for understanding language structure and inferring back to brain function. Now with the rapid developments in neuroscience, what we do know about the brain can inform us about language allowing us to build hypotheses about the role particular brain regions perform in language use. Brain damaged patients thus become populations which serve as test cases. In this volume, the researchers focus on the interactions of frontotemporal dementia patients. These patients have right hemisphere, frontal and temporal pole atrophy which leaves their cognitive abilities intact, but their social interactions impaired and their personalities changed. The volume opens with a discussion of the frontal lobes and their expected contributions to language as a tool for social interaction. Then a conversation analytic approach is applied to analyze what changes in the structure of interaction lead to a sense that the interactions are impaired or inappropriate. Finally, the volume ends with a look forward to what FTD contributes to our understanding of human sociality and what has been gained in our understanding of the brain and language.

The Interactional Instinct explores the evolution of language from the theoretical view that language could have emerged without a biologically instantiated Universal Grammar. In the first part of the book, the authors speculate that a hominid group with a lexicon of about 600 words could combine these items to make larger meanings. Combinations that are successfully produced, comprehended, and learned become part of the language. Any combination that is incompatible with human mental capacities is abandoned. The authors argue for the emergence of language structure through interaction constrained by human psychology and physiology.
In the second part of the book, the authors argue that language acquisition is based on an "interactional instinct" that emotionally entrains the infant on caregivers. This relationship provides children with a motivational and attentional mechanism that ensures their acquisition of language. In adult second language acquisition, the interactional instinct is no longer operating, but in some individuals with sufficient aptitude and motivation, successful second-language acquisition can be achieved.
The Interactional Instinct presents a theory of language based on linguistic, evolutionary, and biological evidence indicating that language is a culturally inherited artifact that requires no a priori hard wiring of linguistic knowledge.

The Interactional Instinct explores the evolution of language from the theoretical view that language could have emerged without a biologically instantiated Universal Grammar. In the first part of the book, the authors speculate that a hominid group with a lexicon of about 600 words could combine these items to make larger meanings. Combinations that are successfully produced, comprehended, and learned become part of the language. Any combination that is incompatible with human mental capacities is abandoned. The authors argue for the emergence of language structure through interaction constrained by human psychology and physiology.
In the second part of the book, the authors argue that language acquisition is based on an "interactional instinct" that emotionally entrains the infant on caregivers. This relationship provides children with a motivational and attentional mechanism that ensures their acquisition of language. In adult second language acquisition, the interactional instinct is no longer operating, but in some individuals with sufficient aptitude and motivation, successful second-language acquisition can be achieved.
The Interactional Instinct presents a theory of language based on linguistic, evolutionary, and biological evidence indicating that language is a culturally inherited artifact that requires no a priori hard wiring of linguistic knowledge.