Harry Bahrick compared those just completing a high school or college Spanish course with people 3 years out of school and found that the latter had forgotten much of what they had learned. However, what people did remember then, they still remembered or more years later. 32 14 25 20

25

Explanation:

Harry Bahrick studied the long-term retention of a foreign language. He investigated the retention of memory by examining 392 graduates from American University. The graduates were shown the photographs which were shown to them. Those photographs were from their high-schools yearbook. They were asked to name the participants of the photographs from the certain names provided to them. The result was found that even after fourteen years 90% of the participants named the photographs correctly. After 47 years, 60% of the participants still remembered and could match the names correctly. In conclusion, it was found that there is certain information that can be remembered by the people for a lifetime.

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