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You know how it is. You spend lots of money on training. The delegates are all fired up and making promises to themselves to do this and change that. And then people go back to their desks and the overflowing in-tray kidnaps their attention. After a few weeks, the fading memory of those new tools and skills hardly ripples in their thoughts as they go about their daily tasks. Their performance is remarkably similar to what it was. Hermann Ebbinghaus published a paper in 1885 describing the shape of the forgetting curve after experimenting with the natural and exponential degradation of memory over time.

Forgetting curve