How does memory retrieval depend on time scale? One strong hypothesis is th
at such retrieval is scale-invariant (i.e., invariant across different time
scales). To test this hypothesis, three groups of participants were given
4 min to recall what they did yesterday, last week, or last year (retrospec
tive memories), and 4 min to recall what they intended to do tomorrow, next
week, or next year (prospective memories). In line with scale invariance,
retrieval performance was indistinguishable across time scales, for both re
trospective and prospective memory. An additional finding was that signific
antly more prospective memories were recalled than retrospective memories,
confirming previous observations of the "intention-superiority effect" (Gos
chke & Kuhl, 1993).