Most conscientious adults tend to avoid making biased or discriminatory comments in the presence of children.

But new research from the University of Washington suggests that preschool-aged children can learn bias even through nonverbal signals displayed by adults, such as a condescending tone of voice or a disapproving look. Published Dec. 21 in the journal Psychological Science, the research found that children can “catch” social bias by seeing negative signals expressed by adults and are likely to generalize that learned bias to others.

Read more at the University of Washington