Where Did the Time Go? Do Not Ask the Brain

Either way, studies find, this biological pacemaker has a poor grasp of longer intervals. Time does seem to slow to a trickle during an empty afternoon and race when the brain is engrossed in challenging work. Stimulants, including caffeine, tend to make people feel as if time is passing faster; complex jobs, like doing taxes, can seem to drag on longer than they actually do.

And emotional events — a breakup, a promotion, a transformative trip abroad — tend to be perceived as more recent than they actually are, by months or even years.

In short, some psychologists say, the findings support the philosopher Martin Heidegger’s observation that time “persists merely as a consequence of the events taking place in it.”

Now researchers are finding that the reverse may also be true: if very few events come to mind, then the perception of time does not persist; the brain telescopes the interval that has passed.