Scientists
have come up with a theory for why time flies when you are having
fun - and drags when you are bored.
Scans have shown that patterns of activity in the brain change
depending on how we focus on a task.
Concentrating on time passing, as we do when bored, will trigger
brain activity which will make it seem as though the clock is
ticking more slowly.
The research, by the French Laboratory of Neurobiology and Cognition,
is published in the magazine Science.
In the study, 12 volunteers watched an image while researchers
monitored their brain activity using MRI
scans.
Volunteers were given a variety of tasks. In one they were told
to concentrate simply on the duration
of an image, in another they were asked to focus on the colour,
and in a third they were asked to concentrate on both duration
and colour.
The results showed that a network of brain regions was activated
when more subjects were paid attention to duration.
It is thought that if the brain is busy focusing on many aspects
of a task, then it has to spread its resources
thinly, and pays less heed to time passing.
Therefore, time passes without us really noticing it, and seems
to go quickly.
However, if the brain is not stimulated in this way, it concentrates
its full energies on monitoring the passing of time.
This may make time seem to drag, but in fact it is probably a
more accurate perception of reality.
Indeed, the researchers found that the more volunteers concentrated
on the duration of the images, the more accurate were their estimates
of its duration.
Lead researcher Dr Jennifer Coull said many of the areas of the
brain involved in estimating time were the same that played a
key role in controlling movement, and preparing for action.
She said this overlap suggests that the brain may make sense
of time as intervals between movements, in much the same way as
a musician marks time with his foot, or an athlete anticipates
the sound of a starter's pistol.
(Agencies)
Updated: 2004-03-08 01:00