The researchers conducted an experiment on 40 college students  They asked these students to memorize the corresponding English words in Swahili  There were ten groups of ten pairs of words in each group  Each group was given a recall test  Each time they made a mistake, they would see one of two kinds of pictures  One is a picture that can produce negative emotions, such as a gun pointing at them  The other is an ordinary picture, such as a chair or a blank image  They were then given an additional one-minute experiment to erase the effect of short-term memory  Finally, the memory of the 100 pairs of words is tested  The test results showed that the students who got the best grades had seen negative pictures
As a result, researchers believe that negative emotions help improve memory
Some of the 40 college students have learned Swahili