Language is a communication system that involves using words and systematic rules to organize those words to transmit information from one individual to another while language is a form of communication not all communication is language many species communicate with one another through their postures movements odors or vocalizations. Introduction to language grammar because all language obeys a set of combinatory rules we can communicate an infinite number of concepts lexicon every language has its rules which act as a framework for meaningful communication but what do people fill introduction to linguistics language . This book provides a comprehensive introduction to the topic of language development taking a perspective that covers the period before birth through old age there are between 4000 and 6000. The text offers in depth discussions on key topics including the biological basis of language perceptual development grammatical development development of lexical knowledge social aspects of language bilingualism the effect of language on thought cognitive processing in language production and comprehension language related delays and disorders and language late in life