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Related Experiment Video

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Experience is Instrumental in Tuning a Link Between Language and Cognition: Evidence from 6- to 7- Month-Old Infants' Object Categorization

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Evolutionary Developmental Biology and Human Language Evolution: Constraints on Adaptation.

W Tecumseh Fitch¹

¹Department of Cognitive Biology, Faculty of Life Sciences, University of Vienna, Vienna, Austria.

Evolutionary Biology

|December 11, 2012

Summary

Evolutionary developmental biology (evo-devo) offers a unified view of adaptation and constraint in organismal evolution. This perspective is key to understanding human language evolution, integrating pre-existing mechanisms for novel functions.

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Area of Science:

Evolutionary biology
Developmental biology
Linguistics
Paleoanthropology

Background:

A long-standing debate exists between adaptationist and constraint-based views in evolutionary biology.
This tension is evident in discussions about human language evolution.
Charles Darwin's concept of "descent with modification" provided an early framework integrating both adaptation and constraint.

Purpose of the Study:

To explore the evolution of human language through the lens of modern evolutionary developmental biology (evo-devo).
To integrate perspectives of adaptation and constraint in understanding language evolution.
To investigate the roles of pre-adaptation and exaptation in shaping language mechanisms.

Main Methods:

Review of evolutionary and developmental biology principles.
Analysis of comparative data on cognitive aspects of language.
Integration of evo-devo concepts with linguistic theories.

Main Results:

Modern evo-devo provides a nuanced approach to adaptation and constraint.
Many cognitive components of human language appear to predate humans, suggesting pre-adaptation and exaptation.
Existing mechanisms have been repurposed and combined to generate novel language capabilities.

Conclusions:

Evo-devo offers a powerful framework for understanding the evolution of complex traits like human language.
Understanding evolutionary and developmental constraints is crucial for a complete picture of language evolution.
The integration of pre-existing cognitive mechanisms has been vital for the emergence of human language.