I am interested in psychology evidence on determinants of leniency of an evaluator. The evaluator will assess a service that is directly related to them (for example, customer satisfaction, or student's teaching evaluation).
There are some papers on Accounting and Business research (like Moers, 2005) suggesting determinants of biased subjective performance evaluations. But I would be more interested in psychological evidence.
Will older evaluators be more lenient? Will married evaluators be more lenient? I have some feelings that these may be true, but could not find any academic evidence.
Are there any other systematic differences in characteristics of the more lenient evaluators?