比喩の認知的影響を探る研究成果(Beyond words: the cognitive force of metaphor)

2025-08-14 マックス・プランク研究所

マックス・プランク数理科学研究所のテイヒ(Marie Teich)氏、レアル(Wilmer Leal)氏、ヨスト(Jürgen Jost)所長らの研究チームは、比喩(メタファー)が単なる修辞表現を超えて、思考や言語の根幹にある認知構造であることを実証しました。複雑系ツールを駆使し、大規模なメタファーネットワークを構築。具体的な概念と抽象的な概念を結びつける「マッピング」の様式と、具体同士の新たなつながりの生成という二つの重要なプロセスを明らかにしました。さらに、日常的なテーマが少数の「強いソース」および「主なターゲット」ドメインとして集中している構造も確認。メタファーは対照と緊張を通じて新たな再概念化や類似性を生み出す創造的認知過程であることが示され、言語学、哲学、AI、認知数学に対して新たな洞察と研究手法を提供しています。研究成果は『PLOS Complex Systems』誌に掲載されました。

比喩の認知的影響を探る研究成果(Beyond words: the cognitive force of metaphor)
Hierarchical representation of semantic roles in the metaphor network.

<関連情報>

時系列データ分析は概念的メタファー理論を支持し精緻化する Diachronic data analysis supports and refines conceptual metaphor theory

Marie Teich ,Wilmer Leal ,Jürgen Jost
PLOS Complex Systems
  Published: August 5, 2025
DOI:https://doi.org/10.1371/journal.pcsy.0000058

Abstract

Our empirical analysis confirms the fundamental assumption in conceptual metaphor theory that metaphors are enduring linguistic and cognitive structures, not merely rhetorical figures. Complex systems tools identified a metaphor network with systematic separation of abstract and concrete categories, and two significant metaphorical processes: mappings from concrete to abstract topics and the emergence of new mappings between concrete domains. Metaphors concentrate on two small sets of everyday topics. One within the concrete group serves as both strong source and target domains, while the other, in the abstract group, primarily acts as targets. These findings can serve as confirmation that metaphor is a creative process emerging primarily from difference and tension between topics which allow (re-)conceptualizations and the display of new similarities.

Author summary

Metaphor theory examines how human thinking, conceptualizations and ideas, arise through new transfers of experiential and earlier acquired structures across thematic domains. These transfers are to some extent reflected in language change over time through metaphor conventionalization. We have carried out a systematic study of such metaphorically generated linguistic changes across the full thematic network of the English language. This analysis revealed several systematic features of metaphorical language change. Two metaphorical processes occur particularly frequently: Metaphors from concrete, often body-related topics, into more abstract topics, which in turn rarely act as metaphor sources, are the most common. The second process are metaphors that transfer and re-conceptualize words within the more concrete topics. Furthermore, we show that metaphorical connections between topics are stable in the long term and investigate the conceptual ordering of topics that results from their metaphorically related neighbors.

1504数理・情報
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