Similarity bias

It occurs when the evaluator makes the mistake of scoring, better than they should, an evaluator who has characteristics similar to their own.

We also have definitions for other types of biases: Memory, Central Tendency, Gender, Commitment Escalation and Confirmation bias.

Similarity bias occurs when an evaluator tends to rate people more positively when they share certain characteristics with them, such as communication style, professional background, interests, education, personality, or even particular personal experiences. This identification can create a sense of affinity that influences the assessment, even when it is not related to performance or the competencies required for the role.

In Human Resources, this bias can arise at different stages of the employee lifecycle. It can influence recruitment processes when an interviewer establishes a particular connection with a candidate because they share experiences or interests. It can also affect performance evaluations, internal promotions, the assignment of responsibilities, or the identification of high-potential employees.