According to Dr. Yassa the first 24 hours are when we are most at risk of forgetting something new weve learned. That is the time to drink a strong cup of coffee or tea, or eat some chocolate.
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This is what he and his team did. They took 160 caffeine-free people and showed them pictures of everyday objects. These people were asked if the objects could be found inside the house or outdoors.
Then some of the subjects were given a caffeine pill. The others were given a placebo -- a pill containing nothing.
Twenty-four hours later, the subjects were shown the exact same images from the day before. They were also shown images with slight differences, and some completely new images.
Both groups correctly identified the exact same and completely new pictures. But those who took the caffeine pill were better at spotting the pictures that were slightly different.
Professor Yassa says their answers helped to show the effects of caffeine on memory.
When they actually had to make a memory judgment and say, Is this the same item I have seen before or not? that was a really important bit of information for us. And we find that if they are on caffeine they are much more likely to make the right decision.
The amount of caffeine the researchers used in the study was similar to one cup of strong coffee.
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