Many students work very hard the night before a deadline. Why? People are pulled toward tasks that feel urgent, or need to be done soon. In one study, many people chose an urgent task even when another task gave a bigger reward.

A famous 2002 study said that deadlines at regular times help people do better. But in 2026, other scientists tried the same test and got different results. Data problems were reported, so the paper was retracted.

Why can we suddenly focus right before a deadline? One reason is that people are attracted to urgency itself. In a 2018 study, many participants chose a task that only looked urgent instead of an important task with a bigger reward. Teams show a similar pattern. A 1988 study of eight teams found that many worked slowly at first and then changed their approach around the halfway point before the deadline.

Meanwhile, a famous 2002 study claimed that evenly spaced deadlines improve performance. In 2026, economists repeated one of its experiments with university students and found that the type of deadline made little difference. Data problems in the original study were also reported, and the journal retracted the paper in September 2026.

The burst of concentration that many people experience before a deadline may stem partly from a preference for urgency. In five experiments reported in 2018, participants frequently chose tasks that merely appeared urgent over important tasks offering larger rewards, a tendency the researchers called the mere urgency effect.

Observational research points in a similar direction: a 1988 study of eight teams with deadlines found that many groups continued with an initial approach until roughly the midpoint of their allotted time, then abruptly revised their strategy and accelerated. The awareness of time running out, rather than the amount of work, seemed to drive the change. For years, a 2002 study was cited as evidence that evenly spaced deadlines reduce procrastination and improve performance, and was well known in procrastination research.

In July 2026, however, a replication of one of its experiments found that deadline structure had little effect on performance, and other researchers reported several anomalies in the original data. After one of the co-authors requested it, the journal retracted the paper in September 2026. The retraction does not show that deadlines are useless. It means only that this particular study can no longer serve as evidence.