> Dr. Carol Dweck... has found that most people adhere to one of two mindsets: fixed or growth.

I'm sympathetic to Khan's overall POV here, but "research says there are basically two kinds of people..." always tickles my skepticism antennae.

Claims like this are so often overstated by researchers to punch up an abstract, and then so often simplified further in uncritical 3rd party reports that I wouldn't bet a sandwich on the truth of any such claim without seeing the data for myself. C.f. the widely believed and largely unsupported claims about learning styles.

Would be nice of Khan to link to the publications so we could decide for ourselves.