Versuche uber den zeitlichen Verlauf des Gedachtnissbildes

The relation between the physical pattern and the reproduction of short temporal intervals: A study in the perception of filled and unfilled time.

“…The intermediate times also varied within the same range. His conclusion is that "the sharpness of the memory image for such a time interval in the course of five minutes decreases so slightly that the decrease can not be certainly determined by this method " (27,82).…”