The study explores the relationship between people's self-report of the use of time management practices and estimates of task duration. The hypothesis is that those who are good time managers will be good at estimating how long a future task will take (expected), how long a previously executed task has taken (retrospective) and how long a task is taking while in process (prospective). In the expected setting results indicate that those who perceive themselves as good time managers are most accurate at estimating the duration of a future task, of those who do not perceive themselves as good time managers some grossly overestimate and many underestimate to quite a considerable extent. The latter finding thus provides support for the 'planning fallacy' (Kahneman & Tversky,1979). In the prospective setting results indicate those who perceive themselves as good time managers tend to underestimate time passing. It is suggested that this is a motivational strategy designed to enhance a sense of control over time. Findings are discussed in relation to existing theories of time estimation
