Linguistic capacity of non-human animals

Area of Science:

• Evolutionary Linguistics
• Primate Communication
• Cognitive Evolution

Background:

• Human language evolution often focuses on combinatorial features, with limited evidence in animal communication.
• Unique human capacities like sophisticated vocal control and theory of mind are rudimentary in primates, suggesting recent evolution.
• Understanding precursors to these abilities is key to tracing language origins.

Purpose of the Study:

• To review evidence for precursors of human language abilities in primate communication and cognition.
• To explore the continuity and discontinuity between primate and human communication systems.
• To propose a model for the gradual evolution of language.

Main Methods:

• Review of recent fieldwork evidence on primate communication.
• Analysis of precursors in sequence-based semantic communication.
• Examination of vocal tract control and audience awareness in primates.

Main Results:

• Evidence suggests precursors to sophisticated vocal control and audience awareness exist in primates.
• Sequence-based semantic communication shows rudimentary forms in non-human primates.
• Both continuity and discontinuity are observed when comparing primate and human communication.

Conclusions:

• The origin of human language likely resulted from multiple gradual transitions from primate-like communication and social cognition.
• It was not a sudden redesign but an incremental development of unique human capacities.
• Primate communication and cognition provide crucial insights into the evolutionary roots of language.