Page 17 - Hands-Free Learning English Final

Chapter 1 – The L&D ROI Mirage: Why Traditional Training Falls Short

Neuroscience and the Forgetting Curve

Neuroscience confirms this illusion: learners forget 70%

within 48 hours and 90% within a month if the

knowledge isn't reinforced. This isn't incompetence, it's
biology. As Hermann Ebbinghaus proved in 1885,

memory decays exponentially without repetition. Yet,

most corporate training still fights this biological reality
with a single workshop followed by silence. Think of it

this way: a three-day leadership retreat without

reinforcement is like watering a plant once and expecting
it to bloom for a year.

Here is a table of the estimated Forgetting
Curve retention rates—showing the typical percentage of

information retained over various time points, based on

research by Ebbinghaus and contemporary memory

studies:

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