When do generalizations move into stereotypes? Stereotypes are overgeneralizations; they often involve assuming a person has certain characteristics based on unfounded assumptions..
We stereotype people based on how they look in terms of sexual orientation, gender, race, and ethnicity. We look at people and may assume they have a certain sexual orientation or that their gender is either man or woman. We may assume they are white, African American, Native American, Asian American, or Latino.
We may be right or we may be wrong.
We also stereotype people based on what we assume about particular categories of identity and what other characteristics are associated with those categories. Some people assume that people who look “homosexual” are sexual predators; that women are nurturing and men are violent; that white people are arrogant; African Americans are loud; Native Americans are drunks; Asian Americans are smart; and that Latinos are lazy.
These are not generalizations, they are stereotypes. They are assumptions based on unfounded ideas about these groups,
not identifying particular characteristics of a group of people. They signify a gap or lack in understanding. We typically stereotype those whom we do not understand or about whom we have no knowledge.~
Everyday Sociology Blog: Understanding Generalizations and Stereotypes