Basics

Shared expectations shape behavior

Compare perceptions of what people usually do with expectations about what they approve.

A library table shows speech-volume symbols beside a quiet-zone sign in two matched panels.
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The picture in words

Descriptive norm
What people are perceived to commonly do.
Injunctive norm
What people are perceived to approve or expect.
Context
A relevant group and setting define the expectation.

Reading the illustration

Compare the quiet behavior with the quiet-zone sign. One suggests what commonly happens; the other communicates what is expected or approved.

Try a question

How could a quiet library communicate both kinds of norm?

Show the explanation

Seeing people speak softly suggests what is common there. A quiet-zone sign states an expected standard of behavior.

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