Its neglect in psychology is one of the crying defects of much recent work.

Its use in complicated problems involves a mathematical training which people generally do not possess; and its misuse through lack of exactness of observation or ignorance of the requirements is worse than its neglect.
Another result came out in connection with these experiments on memory, which, apart from its practical interest, may serve to show an additional resource of experimental psychology.

In making up the results of a series of experiments it is very important to observe the way in which the different cases differ from one another.

Some cases may be so nearly alike that the most extreme of them are not far from the average of them all; as we find, for example, if we measure a thousand No.

10 shot.