Oddly Wired
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information bias

You seek useless information just to feel more certain.

A body of research in judgment and decision-making, discussed in Jonathan Baron's 1988 book Thinking and Deciding, indicates that individuals often seek out information that has no impact on their decision to reduce uncertainty.

Jonathan Baron's 1988 book Thinking and Deciding

You value certainty more than you value the truth.

Where this comes from

Study
Jonathan Baron, 1988, Thinking and Deciding
What the check found
The phenomenon of seeking information that has no impact on a decision is well-documented in behavioral science, but Baron's book is a synthesis of existing literature, not the source of the 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.