: This paper compares American Sign Language (ASL) and British Sign Language (BSL) with spoken English and Spanish. It investigates iconicity —how much a "sign" (word or gesture) physically resembles what it means (e.g., the sign for "drink" looking like drinking from a cup).
: It suggests that early humans had a shared, intentional system of graphic communication long before formal writing systems like cuneiform existed. You can read the full study at PNAS . : This paper compares American Sign Language (ASL)
3. Comparing Visual vs. Spoken Language (Psychology/Linguistics) researchers focused on geometric "signs"—dots
: 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. : This paper compares American Sign Language (ASL)