Loud people are more likely to be noticed than quiet ones.
So, too, are extremely attractive or unattractive individuals.
Because we don’t look at targets in isolation, the relationship of a target to its background influence perception, as does our tendency to group close things and similar things together.
We often perceive women, men, Whites, African Americans, Asian, or members of any other group that has clearly distinguishable characteristics as alike in other, unrelated ways as well.