Ebbinghaus Memorized Several Meaningless Lists of 13 Items Each and Then

Multiple Choice

Ebbinghaus memorized several meaningless lists of 13 items each and then tested his memory after various delays. During which time period did he forget the most material?

A) during the first hour after memorization
B) between the 8th and 12th hours after memorization
C) between the 12th and 24th hours after memorization
D) during the 2nd and 3rd days after memorization