ABSTRACT
Following a general overview of some of the cognitive theories of duration estimation (as distinct from perception) some of their fundamental limitations are identified. A variety of studies, generally of an applied nature, are briefly described and factors that have been found to affect the extent and direction (overestimation/underestimation) of duration estimates are indicated. These are related to findings from a recent study by the author, involving duration estimates. It is then argued that duration estimates can be reasonably viewed as an (albeit indirect) index of cognitive overload that can be mediated by a variety of motivational and affective factors, making them a potentially useful for tool for cognitive ergonomists.
