Effects of rater training on leniency and halo errors in student ratings of instructors

Abstract

Investigated the effects (over time) of a comprehensive vs an abbreviated rater training session on relative levels of leniency error and halo effect. 80 undergraduates (20 per group) rated all of their nonlaboratory instructors over 1, 2, or 3 rating periods using either behavioral expectation scales or summated rating scales. Tests on psychometric error were also administered at these times. Results indicate that the psychometric quality of ratings was superior for the group receiving the comprehensive training, and both training groups were superior to the control groups at the 1st measurement period. No differences were found between any groups in later comparisons. A consistent relationship was found between scores on the tests of psychometric error and error as measured on the ratings. Results are discussed in terms of the diminishing effect of rater training over rating periods, the relationship of internal and external criteria of training effects, the practical significance of differences between groups, and the importance of rating context on rating quality. (16 ref) (PsycInfo Database Record (c) 2025 APA, all rights reserved)