- A visualization of the progress of learning over time, showing that learning is slow at first, then more rapid, then slower again as more esoteric knowledge is gained
- (by extension) A measure of how much there is to learn in a restricted amount of time
2011 April 17, Jessica Creighton, “Mutai and Keitany secure Kenyan London Marathon double”, BBC Sport:
- Damen told BBC Sport: "The crowd were phenomenal they carried me through the last few metres. I don't think you can ever prepare enough for this event. It's a massive learning curve for me. From here, I'd like to work on my shorter distances and get some speed back."