By plotting savings as a function of time,Ebbinghaus created psychology's first:

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Ebbinghaus's plot of savings as a function of time created the first retention curve in psychology, showing how information is retained over time. A learning curve would show how quickly someone learns a new task or information, whereas a psychological law would be a more general principle or pattern in psychology. The study of meaningfulness would be related to how meaningful information is to an individual and how that affects their retention and learning.

By Plotting Savings as a Function of Time,Ebbinghaus Created Psychology's