Ihle A, et al. - The effectiveness of 2 different 4-week strategy-based prospective memory (PM) training types were compared, namely imagery training (targeting the encoding of the PM intention in the intention-formation phase) vs rehearsal training (targeting the maintenance of the PM intention in the intention-retention phase) in older adults. Compared to the strategy targeting the encoding of the PM intention in the intention-formation phase, strategy-based PM training in older adults targeting the maintenance of the PM intention in the intention-retention phase could be more effective in enhancing PM accuracy regarding PM cue detection. Older adults possibly needed additional support to keep the PM cues active in memory while working on the ongoing task than to initially encode the PM intention for successful prospective remembering.