Book: Kindersprache, Aphasie und allgemeine Lautgesetze

Overview

Roman Jakobson's "Kindersprache, Aphasie und allgemeine Lautgesetze" (1941) develops a comparative account of child language acquisition, aphasic impairments, and the regularities that govern sound systems. Jakobson argues that patterns observable in children's speech simplification and aphasic errors are not random pathologies but reflections of deeper phonological principles. He situates those patterns alongside historical sound change, proposing a unified set of "general sound laws" that operate across development, disorder, and linguistic history.

Core Argument

Jakobson contends that both ontogenetic and pathological reductions in phonological complexity reveal implicational relations among phonological units: the presence of a more marked element implies the presence of a less marked one, but not vice versa. From this perspective, children acquire and speakers with aphasia retain the less marked, structurally simpler elements earlier and more reliably, while more marked features are acquired later and more likely to be lost. This asymmetry, he argues, reflects a principled architecture of the phonological system rather than mere performance limitations.

Evidence and Method

Jakobson supports his claims with cross-linguistic observations, clinical reports, and developmental data. He draws attention to consistent patterns such as simplification of consonant clusters, substitution of complex segments with simpler ones, and neutralization of contrasts that share marked properties. Rather than treating developmental stages and aphasic symptoms as isolated facts, Jakobson reads them as systematic outputs shaped by the same structural relations that govern synchronic phonologies and historical change. His method blends careful empirical description with theoretical abstraction, aiming to reveal implicational hierarchies underlying surface variation.

Theoretical Innovations

The paper introduces and sharpens ideas that would later be central to distinctive feature theory and markedness. Jakobson articulates an implicational logic for segmental properties and emphasizes functional and structural reasons why certain features are "marked", more complex, less frequent, or more dependent on context. He treats markedness as predictive: if a language or speaker possesses a marked feature, it must also possess the corresponding unmarked correlate. This theoretical move reframes certain developmental and pathological patterns as evidence for underlying phonological organization, anticipating formal accounts that encode such hierarchies directly.

Impact and Legacy

Jakobson's synthesis had a lasting influence on phonology, psycholinguistics, and clinical linguistics. His framing of acquisition and impairment as windows onto phonological universals informed later generative and feature-based models, and his notion of implicational markedness became a staple of theoretical debate. Clinicians and researchers drew on his insights when interpreting aphasic speech and designing diagnostic criteria, while typologists and historical linguists found his emphasis on cross-domain regularities a productive way to link synchronic and diachronic phenomena. The essay remains a foundational statement about the structural regularities that shape how speech is learned, lost, and altered.