Memory limitations and chunking are variable and cannot explain language structure.

Area of Science:

• Cognitive Science
• Linguistics
• Psychology

Background:

• The Now-or-Never bottleneck hypothesis suggests limitations in working memory capacity constrain language complexity.
• Chunking mechanisms are proposed as a way to overcome these limitations by grouping information.
• Christiansen & Chater (C&C) proposed these constructs as foundational to understanding language's nature.

Purpose of the Study:

• To evaluate the variability and explanatory power of the Now-or-Never bottleneck and chunking mechanisms.
• To investigate alternative explanations for the hierarchical structure of language.

Main Methods:

• The study critically examined the assumptions and empirical support for the Now-or-Never bottleneck and chunking mechanisms.
• An alternative hypothesis focusing on the sequencing of subgoals in language production was explored.

Main Results:

• The Now-or-Never bottleneck and associated chunking mechanisms exhibit greater variability than previously suggested.
• These constructs are insufficient to adequately account for the complexities and hierarchical nature of language.
• The sequencing of subgoals during utterance planning in language production offers a more robust explanation for language's hierarchical structure.

Conclusions:

• The Now-or-Never bottleneck and chunking mechanisms are not robust enough to support existing theories on the nature of language.
• The hierarchical structure of language is better explained by the cognitive processes involved in planning utterances.