An anonymous reader writes: I'm always amazed to discover that a colleague on the engineering side of the business abstains from caffeinated beverages, as coffee or strong tea would seem to be essential tools for modern-day software development. Now a team of researchers at Johns Hopkins has published results demonstrating that caffeine seems to boost long-term memory in a double-blind study in which participants were shown a series of images soon after taking either a caffeine pill or a placebo; 24 hours later they were tested on a similar, but not identical, series of images. Those who took the caffeine pill were more likely to correctly classify images as being different, identical, or similar to those seen the previous day; researchers refer to this as a 'pattern separation' test. The beneficial effect of caffeine on the long-term memory of honey bees was covered by Slashdot earlier. So it's apparent that for the particular case of the effects of caffeine on long term memory, correlation IS equal to... uh, the other one.
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