I just came across another sighting of the mythologic numbers of memory retention, this time on the webpage of HRDQ.
Take a look:
They claim that, "Research shows people remember only 5% of what they hear in a lecture. But they retain 75% when they learn by doing." Bulloney!!
If you want to read my full debunking, click here.
If you want to see many bogus sightings, click here and scroll down.