Malouff, John M

Thorsteinsson, Einar B

2016

This article provides a meta-analysis of experimental research findings on the existence of bias in subjective grading of student work such as essay writing. Twenty-three analyses, from 20 studies, with a total of 1935 graders, met the inclusion criteria for the meta-analysis. All studies involved graders being exposed to a specific type of information about a student other than the student's performance on a task. The hypothesized biasing characteristics included different race/ethnic backgrounds, education-related deficiencies, physical unattractiveness and poor quality of prior performance. The statistically significant overall between-groups effect size was g = 0.36. Moderator analyses showed no significant difference in effect size related to whether the work graded was from a primary school student or a university student. No one type of biasing characteristic showed a significantly higher effect size than other types. The results suggest that bias can occur in subjective grading when graders are aware of irrelevant information about the students.

Australian Journal of Education, 60(3), p. 245-256

2050-5884

0004-9441

https://hdl.handle.net/1959.11/19701

Sage Publications Ltd

Bias in grading: A meta-analysis of experimental research findings

Journal Article

Publication