What's really going on with respect to bias and teaching evals?

Many studies criticize student evaluations of teaching as biased or a poor measure of teaching effectiveness, or both. But none of these papers are as expansive as a new metastudy of more than 100 articles on these student evaluations, or SETs. The new study’s breadth means its authors can cut through the sometimes contradictory research on SETs. And instead of looking at just measurement bias (how well SETs reflect good teaching, or don’t) or just equity bias (how SETs advantage...