Close social networks strongly shape beliefs, often increasing certainty even when views may be inaccurate.

Even one trusted person with different views can reduce belief extremity and broaden perspective.

A new research-based tool helps you assess your network diversity and reflect on its influence.

How does who you know shape what you believe?

It’s a question I’ve spent years studying, starting early in graduate school. My research has found that the people we discuss important matters with (not casual acquaintances or social media contacts, but our real inner circle) have a strong influence on our beliefs. When everyone close to you shares the same political or religious views, those beliefs get reinforced and sustained. So, the more your inner circle........

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