Are We Good at Measuring Grit?

Some California schools are using socio-emotional measures to assess students' performance. John Sutter: Angela Duckworth, the standard bearer for grit, says it's a bad idea. He asks her how can she claim that grit is so important while claiming we're not very good yet at measuring grit? Sutter: Any data that we get from these measures is going to carry signal, but also noise.