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Laying foundations for an interdisciplinary approach to the study of evolution in communication systems with tools from evolutionary biology, linguistics, animal behavior, developmental psychology, philosophy, cognitive sciences, robotics, and neural network modeling.The search for origins of communication in a wide variety of species including humans is rapidly becoming a thoroughly interdisciplinary enterprise. In this volume, scientists engaged in the fields of evolutionary biology, linguistics, animal behavior, developmental psychology, philosophy, the cognitive sciences, robotics, and neural network modeling come together to explore a comparative approach to the evolution of communication systems. The comparisons range from parrot talk to squid skin displays, from human language to Aibo the robot dog's language learning, and from monkey babbling to the newborn human infant cry. The authors explore the mysterious circumstances surrounding the emergence of human language, which they propose to be intricately connected with drastic changes in human lifestyle. While it is not yet clear what the physical environmental circumstances were that fostered social changes in the hominid line, the volume offers converging evidence and theory from several lines of research suggesting that language depended upon the restructuring of ancient human social groups. The volume also offers new theoretical treatments of both primitive communication systems and human language, providing new perspectives on how to recognize both their similarities and their differences. Explorations of new technologies in robotics, neural network modeling and pattern recognition offer many opportunities to simulate and evaluate theoretical proposals. The North American and European scientists who have contributed to this volume represent a vanguard of thinking about how humanity came to have the capacity for language and how nonhumans provide a background of remarkable capabilities that help clarify the foundations of speech.

Parents are remarkably accurate observers of their infants''canonical babbling', the production of well‐formed syllables. With very little training, many parents across a wide range of socioeconomic status make flawless judgments of canonical stage onset. The results of concordance studies between parental and trained‐observer judgments support the idea that recognition of canonical babbling may be intuitive. Without instruction, parents identify the onset of canonical babbling when it occurs, and thereafter they begin to interpret sounds produced by children in ways that may encourage word learning.The fact that parents can provide accurate information about stage of vocal development, along with the fact that late onset of canonical babbling has been shown to be an extremely important indicator of risk for hearing loss and language‐related disabilities, suggests the possibility of using a brief interview to identify infants at risk.