Stephanie is observing a group of adolescents at the mall and documenting their rate of swearing. The group keeps looking over at Stephanie and pointing at her, and they get louder and more obnoxious the longer she observes them. Which of the following terms describes Stephanie's effect on the group?

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Stephanie's effect on the group is called reactivity, which refers to how people may change their behavior when they know they are being observed. The group is reacting to Stephanie's presence and behavior by becoming more obnoxious and disruptive. Stereotyping refers to making assumptions about a group of people based on their appearance or behavior. Phenotyping is the process of identifying an individual's physical or behavioral traits based on their genotype or genetic makeup. Confounding refers to factors that may affect the results of an experiment but are not accounted for in the study design.

Stephanie Is Observing a Group of Adolescents at the Mall