Observer bias refers to the tendency of a person to see and interpret events or information based on their own beliefs, experiences, or opinions. This bias can affect the accuracy and objectivity of their observations or judgments. Full definition
Those inconsistencies may be due to factors such as observer bias in a laboratory setting and small sample sizes. (sciencedaily.com)
And it called for more research into human observer bias, establishment of routine quality control and quality assurance measures, and development of a national code of ethics for all forensic science disciplines. (abajournal.com)
The scientific method requires that we be able to eliminate factors such as observer bias, for example. (climateaudit.org)