Oddly Wired
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identity

You think your personality is finished developing today.

The end-of-history illusion shows people recognize they have changed in the past but mistakenly believe they will remain mostly static in the future.

In a study of 19,000 adults, participants consistently underestimated the degree to which their tastes, values, and personalities would shift over the next decade. They view their current self as the final, perfected version.

The person you are today is just another temporary phase.

Where this comes from

Study
Quoidbach, Gilbert, and Wilson, 2013
What the check found
The study by Quoidbach, Gilbert, and Wilson (2013) is a well-replicated psychological finding and the reported sample size is correct.
Confidence
Well replicated

Related

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