https://phys.org/news/2018-06-fair-classroom-threat-retaliation.html

"We've long known there's an association between expected students' course grades and how they evaluate teachers. However, our study is the first to show that grades influence evaluations much less, if at all, when students can see what fair processes instructors use to assign grades," said lead author Thomas Tripp, Carson College of Business associate dean, WSU Vancouver.

Tripp conducted this study with former WSU doctoral students, Lixin Jiang, University of Auckland; Kristine Olson, Dixie State University; and Maja Graso, University of Otago.