The study examined the effect of task speed and delay on the perceptio
n of time. 60 subjects were randomly allocated to four groups in a 2 x
2 design. The first factor related to the speed of the task (fast or
slow) undertaken during the time to be estimated, while the second fac
tor related to when time estimates were obtained (immediately after th
e task versus following a delay). Analysis supported the hypothesised
interaction, with time estimates being shorter in the fast than in the
slow condition when obtained immediately after the task but longer in
the fast than the slow condition when obtained after a delay. Results
are discussed in relation to cognitive theories of time perception.