in contrast to reinstatement, a single passive re-exposure to an isolated component of the original salient training event that increases the accessibility of memory for the original training experience. Considered to be the first stage of (declarative) memory retrieval. Through the pioneering work of Carolyn Rovee-Collier(1942-2014), it is known that infants as young as 3-months of age showed no forgetting some 2 to 4 weeks later as a consequence of reactivation experience (forgetting usually occurring after a 8 day- retention period).
See Declarative (or explicit) and procedural memory, Mobile conjugate reinforcement, Reinstatement