Angela Duckworth
Looks like Dr. Duckworth has updated her page, no doubt in advance of her book - “Grit: The Power of Passion and Perseverance” which JUST came out a few days ago (I’ll be reading it ASAP.
This link is an automated Grit Scale evaluation, which is really handy in this format.
This time, I scored a 4.30 out of 5.0, a big improvement from my last score of 3.83