There are three types of memory retention. Recall: it is the measure of memory where the individual recovers information that had been acquired previously (fill-in-the-blank). Recognition: distinguishing what you have learned before. Relearning: learning much quicker when you acquire this information after briefly learning it after either the first or even second time. You may not be able to recall your high school classmates, however you still would be able to remember their faces from their yearbook photos. And then, you would recognize their name from the class list. When an individual is recognizing and recalling or even retrieving information from the brain through the learning process of memory, it is fast and quick. There is a correlation and relationship between relearning speed/memory. Hermann ebbinghaus revealed this more than 100 years ago. He showed this through syllables: tah, zub, qop, meh, rit, yad, bev, sil, Jua, ker, nac, eax, zif, cew, biz, uio, leq, daf, vaz, pid, gat, dau.