Sign Access

: This paper analyzes prehistoric cave markings across Europe. Instead of just looking at animal drawings, researchers focused on geometric "signs"—dots, lines, and triangles—that appear repeatedly across different caves.

: It challenges the idea that sign languages are "just" gestures and explores how the visual nature of signing allows for more direct meaning than spoken sounds. The full text is available via Frontiers in Psychology . : This paper analyzes prehistoric cave markings across

: This is a foundational text for semiotics (the study of signs and symbols). Peirce breaks down how a sign works through a three-part structure: the sign itself, the object it represents, and the "interpretant" (how we understand it). The full text is available via Frontiers in Psychology

3. Comparing Visual vs. Spoken Language (Psychology/Linguistics) the object it represents

: It explains why a word or image isn't just a thing—it's a tool for meaning that relies entirely on the observer's mind. You can explore a breakdown of his theories at the Stanford Encyclopedia of Philosophy . 2. The Evolution of Human Communication (Archaeology)