Repeated imitation makes human vocalizations more word-like.

Area of Science:

• Cognitive Science
• Linguistics
• Evolutionary Psychology

Background:

• The origin of spoken words remains a significant question in understanding language evolution.
• Investigating the potential link between vocal imitation of environmental sounds and early word formation.

Purpose of the Study:

• To determine if repeated imitation of environmental sounds leads to more word-like forms.
• To assess the degree of sound resemblance (iconicity) retained in imitations over generations.
• To explore the role of vocal imitation in the emergence of conventional spoken words.

Main Methods:

• Participants engaged in a modified 'Telephone' game, imitating environmental sounds.
• Imitations were passed through up to eight generations.
• The stability, word-likeness, and learnability of imitations were analyzed.

Main Results:

• Imitations progressively became more stable and word-like over generations.
• Later imitations were easier to learn as category labels.
• Despite transformations, imitations and transcriptions retained above-chance resemblance to original environmental sounds.

Conclusions:

• Repeated vocal imitation can generate word-like forms while preserving sound iconicity.
• This process offers a plausible mechanism for the origin of some spoken words.
• Human vocal imitation may be a key factor in the evolution of early language.