Hermann Ebbinghaus
German psychologist whose 1885 research established the forgetting curve — one of the earliest empirical studies of memory decay.
The Forgetting Curve in Workshops
Your workshop isn't failing because participants aren't committed. It's failing because memory decay was never engineered out of the design.
The 80/20 Workshop Engagement Ratio
The 80/20 engagement ratio is a principle stating that participants should be actively working with material for approximately 80% of a live session.