Time-based prospective memory, the ability to carry out a future intention
at a specified time, was found to be impaired in a community sample of clin
ically depressed adults, relative to a nondepressed sample. Nondepressed pa
rticipants monitored the time more frequently and, in the final block of th
e task, accelerated time-monitoring as the target time for the prospective
memory response approached. These results are consistent with previous find
ings of depression-related impairments in retrospective memory tasks that r
equire controlled, self-initiated processing.