The Study of Language

George Yule's The Study of Language, now in its eighth edition, is an introductory linguistics textbook designed for readers with no prior knowledge of the subject. The book surveys what is known about language and how linguists study it, covering both the internal structure of language (its form) and the varied uses of language in human life (its function). Yule organizes 20 chapters that move from the origins and properties of language through its sounds, structures, and meanings to its social and cultural dimensions.

The book opens by examining theories about how human language originated. No definitive answer exists, and Yule surveys proposals including the "divine source" theory (language as a divine gift), the "bow-wow" theory (imitation of natural sounds), the musical source theory (melody preceded words), and the social interaction source (sounds developed for group coordination). He also examines the physical adaptation source, noting how anatomical features such as upright posture and a descended larynx evolved to support speech, as well as the tool-making source, which highlights the close proximity in the brain between areas controlling vocalization and hand manipulation. The chapter closes with the gesture source, which proposes that manual gesture preceded spoken language, and the innateness hypothesis: the idea that a genetic capacity for language is present in every human newborn.

Yule then defines properties that distinguish human language from animal communication: displacement (referring to things not present), arbitrariness (no natural connection between a word and its meaning), cultural transmission (language is learned socially, not inherited genetically), productivity (creating unlimited new expressions), duality (language operates at two levels: individual sounds and meaningful combinations), and reflexivity (using language to talk about language itself). The chapter reviews experiments in which chimpanzees and bonobos were taught symbol systems. While these animals demonstrated some ability to combine symbols, none developed the complex grammatical system that characterizes human language.

Two chapters address the sounds of language. Phonetics introduces the International Phonetic Alphabet (IPA) and describes consonants by voicing (whether the vocal folds vibrate), place of articulation (where in the mouth airflow is constricted), and manner of articulation (how airflow is constricted). Vowels are classified by tongue position. Phonology, the study of abstract sound patterns, introduces the phoneme (a meaning-distinguishing sound unit), allophones (variant pronunciations of a single phoneme), minimal pairs, and phonotactics (constraints on permissible sound combinations). Coarticulation effects such as assimilation and elision illustrate how sounds influence one another in connected speech.

Two chapters cover word structure. Yule identifies the major processes by which new words enter English: borrowing from other languages, compounding, blending (e.g., smog from "smoke" and "fog"), clipping (e.g., ad from "advertisement"), backformation, conversion, coinage, acronyms, and derivation through affixes. The chapter on morphology defines the morpheme as the minimal unit of meaning or grammatical function. Free morphemes can stand alone; bound morphemes must attach to other forms. Derivational morphemes create new words or change grammatical categories, while English has only eight inflectional morphemes, all suffixes. Yule illustrates morphological diversity through examples from Kanuri, Ganda, Ilocano, and Tagalog.

Two chapters address sentence structure. Yule distinguishes among traditional grammar (originating in descriptions of Latin and Greek), the prescriptive approach (setting rules for "proper" usage), and the descriptive approach (describing structures actually used). He defines the parts of speech, explains agreement, introduces constituent analysis, and surveys word order typology across languages. In the chapter on syntax, Yule introduces generative grammar: a finite set of rules capable of producing an infinite number of well-formed sentences. Phrase structure rules and tree diagrams represent the hierarchical organization of sentence structure.

Two chapters examine meaning. Semantics covers semantic features, semantic roles (agent, theme, instrument, experiencer), and lexical relations including synonymy, antonymy, hyponymy, and polysemy. Pragmatics focuses on how more is communicated than is literally said, covering deictic expressions, reference, inference, presupposition, and the Co-operative Principle articulated by philosopher Paul Grice. Yule also discusses politeness (involving "face," or public self-image) and the distinction between direct and indirect speech acts. The chapter on discourse analysis extends these ideas beyond the sentence, examining cohesion (formal ties within texts), coherence (meaningful connections readers create using background knowledge), conversation analysis, and the role of schemas and scripts in shaping interpretation.

Yule then turns to language and the brain. He identifies Broca's area (involved in speech production) and Wernicke's area (involved in comprehension) in the left hemisphere, connected by the arcuate fasciculus, a bundle of nerve fibers. Damage to these areas produces distinct types of aphasia, or language impairment caused by localized brain damage. The critical period hypothesis holds that language must be acquired between birth and puberty; the case of Genie, a girl discovered at age 13 after extreme childhood deprivation, showed limited language development and provided evidence for this hypothesis.

Two chapters address language acquisition. First language acquisition proceeds through predictable stages: cooing, babbling, one-word utterances, two-word combinations, and telegraphic speech. Children actively construct rules rather than learning through imitation, as shown by persistent forms like "holded" and "goed." Second language acquisition differs fundamentally: Adults face barriers including age, affective factors such as anxiety, and interference from the first language. Teaching methods range from grammar-translation to communicative and task-based learning. The learner's interlanguage, an in-between system containing elements of both languages, may fossilize (cease developing) or continue to progress.

Yule's chapter on gestures and sign languages distinguishes between gestures accompanying speech and sign languages used instead of speech. American Sign Language (ASL), which originated from French Sign Language and was brought to the United States in the early 19th century by Laurent Clerc and Thomas Gallaudet, is a natural language with all the defining properties of human language. Oralism, a teaching method requiring deaf students to practice speech sounds and lip-reading rather than sign, dominated deaf education for most of the 20th century but had very low success rates. Nicaraguan Sign Language (NSL), created spontaneously by deaf children in the 1980s, provides evidence for the innate human capacity for language creation.

The chapter on writing traces written language from pictograms (picture-based representations) through ideograms (abstract concept symbols) and logograms (symbols representing words, as in Sumerian cuneiform and Chinese characters) to phonographic systems. Syllabic writing uses one symbol per syllable, as in the Cherokee syllabary invented by Sequoyah in the early 19th century. Semitic languages developed consonantal alphabets, and the Greeks created the first full alphabet by adding separate vowel symbols. English orthography is irregular because of borrowed spellings, preserved older pronunciations, and 16th-century spelling reforms.

The final chapters address language variation. Yule traces the Indo-European language family to a hypothesized Proto-Indo-European ancestor and divides the history of English into Old English (before 1100), Middle English (1100–1500), Early Modern English (1500–1700), and Modern English (after 1700). He examines regional variation through dialect surveys and isoglosses (lines on maps separating areas with different linguistic features), alongside bilingualism, pidgins (simplified contact languages developed for purposes like trade), and creoles (languages that develop when pidgins become the first language of a community's children). Social variation focuses on class-based speech differences, as in sociolinguist William Labov's New York department store study, which linked /r/ pronunciation to socioeconomic status. The book concludes with language and culture, examining how languages categorize reality differently. Yule presents the Sapir-Whorf hypothesis (the idea that language structure influences thought) and closes with gendered speech and the shift toward gender-neutral language, including the increasing use of singular they.