Oddly Wired
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time

New experiences make time feel like it's slowing.

Initial studies suggested an unexpected stimulus makes its duration appear 30–50% longer, though later research shows the effect is generally around 10% or less.

The claim uses the lower bound of initial, higher estimates rather than the more modest findings reported in subsequent replications.

Routine makes your life feel like it is moving faster.

Where this comes from

Study
Tse, Intriligator, Rivest, and Cavanagh, 2004
What the check found
While the 30% figure appears in the early literature, presenting it as the definitive effect size ignores more recent, more modest findings.
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.