Authority bias is the tendency for a person to more readily accept the opinions of an authority figure, without applying critical thought or personal consideration of the merits of their claims.
While authorities on a given subject are more likely to have informed opinions on that subject, it’s often the case that experts can disagree and there’s a level of subjectivity in what opinions are ultimately true.
Example of Authority Bias
A doctor recommends a treatment program for a given condition, but the treatment program is based on outdated science or methodologies.
While doctors are experts on health and medical matters, not all doctors will agree on the correct course of treatment for a condition. It's also possible that new research and science has come out that defines a more effective treatment program, that the doctor may not be aware of.