Source: 1913 The Journal of Education [c.1 v.71-78 1913]
Description: A weekly journal, devoted to education, science, and literature.
How was it found? Hathitrust search
Search Term: "of what we hear"
What was found?
We remember 20% of what we hear
We remember 50% of what we see
We remember 70% of what we touch
We remember 90% of what we do
Note: "-10" was interpreted to be "0%," with the "-10" probably used due to typographical limitations at the time.