Definition: Affinity Bias (Mini-Me effect, similarity error)
The affinity bias — also known as the mini-me effect, affinity distortion, or similarity error — is an unconscious bias in which people tend to prefer those who are similar to them. This may relate to common interests, backgrounds, experiences, or other personal characteristics.
Examples of affinity bias
Sound familiar?
You particularly like the new colleague because you are both Victoria Berlin fans and happened to grow up in the same city.
What is the reason for that?
This is due to the similarity error
Affinity bias in hiring describes our tendency to like and hire people who are similar to us — whether through shared hobbies, education, or even ethnicity.
A single characteristic perceived as positive is generalized into an overall positive impression of the person. The standard here is resemblance to oneself, which is why this is also referred to as the “Mini-Me Effect” (Voss, 2014).
People who are similar to you automatically appear more likeable, and you tend to attribute positive qualities to them (Agarwal, 2018). This mechanism rests on the illusion that, because you already know yourself well, you can also accurately judge the other person.
What else is a bias? We explain:
A bias generally describes a systematic distortion in human perception, thinking, or behavior. It is a type of “mental abbreviation” or bias that subconsciously influences our judgment and decision making.
These distortions can result from personal experiences, cultural influences, emotional states or evolutionary thought patterns. While they often help us make quick decisions, they can also lead to miscalculations and irrational decisions.
Other examples of biases in the HR process include:
- Confirmation Bias: The Confirmation Bias
We prefer information that supports our existing point of view and ignore conflicting information. - Primacy Effect: The First Impression Mistake
The first impression has a disproportionate influence on the overall assessment and is difficult to change. - Halo & Horns Effect: Distortion due to individual features
A single positive (halo) or negative (horn) aspect outshines a person's entire perception. - Status quo bias: favoring the existing
Existing conditions are preferred over changes, even if they would be beneficial. - Stereotypes/Gender/Racial Bias
Unconscious prejudices against marginalized groups influence decisions. - Conformity Bias: The Adjustment Mistake
Adapting one's own decisions to group opinions due to fear of negative evaluation. - Illusory Correlation: The Perception of False Connections
False assumption of relationships between independent properties. - Contrast Bias: The Contrast Effect
Evaluation of a person in direct comparison with previous or successor rather than according to objective criteria. - Overconfidence Bias: The Trap of Overconfidence
Overestimation of one's own judgment and excessive reliance on “gut feeling.”
Identifying our own biases is the first step towards becoming more aware and more objective decisions within personnel selection to be able to meet.
How structured pre-selection helps avoid this distortion is shown by Aivy's assessment procedures.
This effect is one of 17 patterns that shape hiring decisions. The overview is in Unconscious Bias in Recruiting.
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