| Summary: | Nostalgia is a resource that functions, in part, as a response to self-discontinuity and a source of self-continuity. We tested and supported this regulatory role of nostalgia in the tradition of establishing a causal chain. In Study 1, we examined the naturalistic association between events precipitating self-discontinuity and nostalgia. Self-discontinuity, especially when stemming from negative life events, was associated with higher proneness to nostalgia. In Study 2, we experimentally induced negative self-discontinuity (i.e. relatively disruptive), positive self-discontinuity (i.e. relatively non-disruptive) or self-continuity (i.e. neutral non-disruptiveness) and subsequently assessed state levels of nostalgia. Only negative self-discontinuity evoked heightened nostalgia. In Study 3, we experimentally induced nostalgia (versus ordinary autobiographical recollection) and assessed self-continuity. Nostalgia augmented self-continuity. In Study 4, we experimentally induced nostalgia (versus ordinary autobiographical recollection versus positive autobiographical recollection) and assessed self-continuity. Again, nostalgia augmented self-continuity and did so above and beyond positive affect. Here, we ruled out demand characteristics as a rival hypothesis. Taken together, the findings clarify the role of nostalgia in the dynamic between self-discontinuity and self-continuity and elucidate the restorative properties of nostalgia for the self-system
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