Answer:
The tendency of a person to forget the things in the middle of a series or list is called the serial position effect.
Explanation:
The serial position effect is described as the tendency of a person recall or remember the first and the last items in a particular series or list, nicely. Whereas, the middle items are the worst to recall.
Hermann Ebbinghaus performed various studies on himself and therefore, concluded that the recall accuracy varies depending upon the position of the item in the list. He then coined the term serial position effect, for this effect.
Therefore, the tendency of a person to forget the things in the middle of a series or list is called the serial position effect.