Term

calibration

In the book, the fine-tuning of a skill: attention to proportions, timing and the small things that mastery is made of.

Explained in

The 5AM Club: Own Your Morning. Elevate Your Life., Robin Sharma
The Signal and the Noise: Why So Many Predictions Fail, but Some Don't, Nate Silver
How well promised probabilities match what actually happens. A forecast is well calibrated if, on the days it gives a 30 percent chance of rain, it rains about 30 percent of the time.
Superforecasting: The Art and Science of Prediction, Philip Tetlock, Dan Gardner
How well forecasts match how often things happen: if, out of a hundred cases forecast at 70%, the event happens in about seventy, the forecaster is well calibrated.
The Scout Mindset: Why Some People See Things Clearly and Others Don't, Julia Galef
When your confidence matches how often you are actually right: of the claims you rate at 70 percent, about seven in ten turn out true.
Make It Stick: The Science of Successful Learning, Peter C. Brown, Henry L. Roediger III, Mark A. McDaniel
Bringing your estimate of your own knowledge in line with your real level through an external check: a test, feedback, practice.