The Lunch effect. Can it result in biased grading at universities?

Abstract

Examining exam results from an oral exam at a Norwegian university, reveals that there may be supporting evidence for the existence of a lunch-effect. Results suggests that censors are making the “easy” choices right before lunch, as compared with right after. The results are both a support to Danziger et al. (2011a) and to the existing literature on biased grading in general.