Oddly Wired
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social dynamics

You judge a person's intelligence by their physical beauty.

A 1972 study found that people with attractive faces were consistently rated as having more desirable personality traits and better life prospects.

Participants provided these ratings without any information about the person's character or history. This implicit association suggests an automatic process where one positive trait colors the perception of others in a holistic judgment.

Your brain builds a character sketch from a first glance.

Where this comes from

Study
Dion et al. (1972)
What the check found
This is a well-established finding in social psychology known as the 'halo effect' or 'what is beautiful is good' stereotype, documented in the 1972 Dion, Berscheid, and Walster study.
Confidence
Solid, with limits

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.