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time perception

Time perception changes as you get older.

Research indicates that your sense of how fast time passes is linked to how much new information you encode; as encoding slows, time feels like it accelerates.

When you are young, your brain processes novel information rapidly, creating a dense network of memories that makes time feel expansive. In adulthood, routines decrease the volume of new experiences, causing the brain to 'compress' these periods in retrospect.

A monotonous life makes years feel like minutes.

Where this comes from

Study
Wittmann, 2015, Felt Time
What the check found
This is a well-established psychological concept known as the 'Holiday Paradox.' While the source is correct and the theory is widely accepted, it describes retrospective time estimation, not prospective timing.
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.