Iconicity in Large Language Models

Fuente: arXiv
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Auteurs principaux: Marklová, Anna, Milička, Jiří, Ryvkin, Leonid, Bennet, Ľudmila Lacková, Kormaníková, Libuše
Format: Preprint
Publié: 2025
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author Marklová, Anna
Milička, Jiří
Ryvkin, Leonid
Bennet, Ľudmila Lacková
Kormaníková, Libuše
author_facet Marklová, Anna
Milička, Jiří
Ryvkin, Leonid
Bennet, Ľudmila Lacková
Kormaníková, Libuše
contents Lexical iconicity, a direct relation between a word's meaning and its form, is an important aspect of every natural language, most commonly manifesting through sound-meaning associations. Since Large language models' (LLMs') access to both meaning and sound of text is only mediated (meaning through textual context, sound through written representation, further complicated by tokenization), we might expect that the encoding of iconicity in LLMs would be either insufficient or significantly different from human processing. This study addresses this hypothesis by having GPT-4 generate highly iconic pseudowords in artificial languages. To verify that these words actually carry iconicity, we had their meanings guessed by Czech and German participants (n=672) and subsequently by LLM-based participants (generated by GPT-4 and Claude 3.5 Sonnet). The results revealed that humans can guess the meanings of pseudowords in the generated iconic language more accurately than words in distant natural languages and that LLM-based participants are even more successful than humans in this task. This core finding is accompanied by several additional analyses concerning the universality of the generated language and the cues that both human and LLM-based participants utilize.
format Preprint
id arxiv_https___arxiv_org_abs_2501_05643
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Iconicity in Large Language Models
Marklová, Anna
Milička, Jiří
Ryvkin, Leonid
Bennet, Ľudmila Lacková
Kormaníková, Libuše
Computation and Language
Artificial Intelligence
Lexical iconicity, a direct relation between a word's meaning and its form, is an important aspect of every natural language, most commonly manifesting through sound-meaning associations. Since Large language models' (LLMs') access to both meaning and sound of text is only mediated (meaning through textual context, sound through written representation, further complicated by tokenization), we might expect that the encoding of iconicity in LLMs would be either insufficient or significantly different from human processing. This study addresses this hypothesis by having GPT-4 generate highly iconic pseudowords in artificial languages. To verify that these words actually carry iconicity, we had their meanings guessed by Czech and German participants (n=672) and subsequently by LLM-based participants (generated by GPT-4 and Claude 3.5 Sonnet). The results revealed that humans can guess the meanings of pseudowords in the generated iconic language more accurately than words in distant natural languages and that LLM-based participants are even more successful than humans in this task. This core finding is accompanied by several additional analyses concerning the universality of the generated language and the cues that both human and LLM-based participants utilize.
title Iconicity in Large Language Models
topic Computation and Language
Artificial Intelligence
url https://arxiv.org/abs/2501.05643