Actuation and Propagation of Change

Why a linguistic change begins when and where it does, and how an innovation spreads through a speech community and across geographic and social space.

Definition

Actuation is the onset of a linguistic change, the question of why a given innovation arises when and where it does, while propagation is the subsequent spread of that innovation through a speech community.

Scope

This topic addresses the social life of language change: the actuation problem (why a change starts in a particular language at a particular time), and the propagation or diffusion of innovations through social networks, across the lexicon, and over geographic space (including the wave model and the role of dialect contact). It draws heavily on variationist sociolinguistics.

Core questions

• Why does a particular change begin at a particular time and place (the actuation problem)?
• How do innovations spread through social networks and across communities?
• What is the role of social factors such as class, gender, and identity in propagating change?
• How do changes diffuse geographically, and what does the wave model capture?
• How is the embedding of a change in linguistic and social structure studied?

Key theories

The five problems of change (WLH framework)

Weinreich, Labov, and Herzog distinguished the constraints, transition, embedding, evaluation, and actuation problems, arguing that a theory of change must explain how orderly heterogeneity arises, is embedded, is evaluated, and ultimately why change is actuated at all.

Social embedding and diffusion of change

Labov's work on social factors shows how variants carry social meaning and spread through communities differentiated by class, gender, and network, with leaders of change often occupying specific social positions.

History

The distinction between the origin and the spread of change was sharpened in Weinreich, Labov, and Herzog's 1968 programmatic statement, which framed the central problems of change theory. Labov's two-volume Principles of Linguistic Change developed the internal and social dimensions in detail, establishing variationist sociolinguistics as the dominant empirical approach to change in progress.

Debates

Solvability of the actuation problem

Whether the actuation problem can ever be fully solved, or whether the precise onset of a change is inherently unpredictable, remains an open question at the heart of change theory.

Key figures

• William Labov
• Uriel Weinreich
• Marvin Herzog

Seminal works

• weinreichLabovHerzog1968
• labov2001

Frequently asked questions

What is the actuation problem?

It is the question of why a particular linguistic change begins in one language at one time, given that the same structural conditions may exist in other languages or periods without triggering the change.

Who leads linguistic change?

Variationist studies often find that changes are led by particular social groups; Labov's research frequently identifies women and speakers in certain social-network positions as leaders, though patterns vary by community and change.