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Implementation intentions and prospective memory function in late adulthood.

Prospective memory (PM) is a critically important component of memory that often declines in late adulthood. Implementation intentions, an encoding strategy, consisting of an explicit if-then "I will . . ." statement, has been effectively used to enhance older adults' prospective memory function. However, it remains to be established whether forming a mental representation of carrying out the task when forming the intention enhances these age effects, as well as whether the type of cue (event or time based) moderates age-related benefits. To test these questions, we randomly allocated 125 younger and 125 older adults to 1 of 5 conditions, in which they were directed to use different strategies when forming their PM intentions (Statement Only, Imagine in Game, Statement and Imagine Combined, Imagine in Daily Life, Control). The results indicated that use of the implementation intentions statement alone and in combination with forming a mental representation of carrying out the task substantially enhanced older adults' event- but not time-based PM. In addition, while the Statement Only condition reduced age-related difficulties for event-based tasks, the condition that combined this statement with visualization led to the greatest reduction in age effects. These data suggest that both rehearsing the implementations intention in the specific statement format combined with visualizing may be optimally effective for enhancing PM function in late adulthood but that the type of PM cue is an important moderator of these age effects. In addition to theoretical implications, these results may inform the refinement of interventions focused on enhancing PM function in late adulthood. (PsycInfo Database Record (c) 2020 APA, all rights reserved).