What is out-group homogeneity bias?
This is the perception that out-group members are more similar to one another than your in-group members, e.g. “they are alike; we are diverse”. An example could be someone being white (in-group = white individuals) and perceiving Asians as relatively similar (out-group = Asian individuals).
This bias is strongly impacted by Affinity/Similarity Bias and leads to Stereotyping Bias.
Example of out-group homogeneity bias in the hiring process.
A hiring manager or recruiter can have a stereotyped belief about a candidate based on their out-group because the hiring manager perceives the candidate as very similar to another individual they know who belongs to this out-group.