This is a legit study. If you search the web, there are also a bunch of kids science fair projects that have done similar tests (not including the illegal drugs of course)The tests referenced above were published in:NASA Tech Briefs 19(4):82. Published in Britain's New Scientist magazine, 27 April 1995Some refs:http://www.biopsychiatry.com/chloralhyd ... bu...s.htm
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No hoax. I remember reading an article in Popular Science about 8 years ago that had spiders building webs on different controlled substances. I am not sure if caffeine was one of those cause I can't remember. But this reminds me of something I saw on the way home from work today. A convenience store had a sign outside that said "Try our new Cappachino, Three times the caffeine."