(This is known as the recognition method.

) The two investigations were based on two different types of memory.

In the case of Ebbinghaus work S had to recall the hst.

In the case of the writers investigation S had merely to recognize the words he had previously seen, to distinguish between the new words and the old words.

But in both cases the extent to which S could recall or recognize was due to the strength of the bond that had been formed during the learning.