Re:They're stereograms.

Okay, back to words-- i have heard them called
RAS-- Random dot Astiogram S, pronounced, RAZZ(as in razz a ma tazz) -- why astiogram's? i dunno. don't remember all the detail of them either.

Steve Pinker has an nice explaination of how and why they work in How the Mind Words, someplace about page 340, (give or take 20 pages or so)if you want some details, thats one place to look.--opps, i slipped there-- but it was an interesting, and challenging concept to understand, and i reread it several times, and still only have a vague understanding.