This research examined the proposition that nostalgia is not simply a past-oriented emotion, but its scope extends into the future, and, in particular, a positive future. We adopted a convergent validation approach, using multiple methods to assess the relation between nostalgia and optimism. Study 1 tested whether nostalgic narratives entail traces of optimism; indeed, nostalgic (compared to ordinary) narratives contained more expressions of optimism.Study 2 manipulated nostalgia through the recollection of nostalgic (vs. ordinary) events, and showed that nostalgia boosts optimism. Study 3 demonstrated that the effect of nostalgia (induced with nomothetically-relevant songs) on optimism is mediated by self-esteem.Finally, Study 4 established that nostalgia (induced with idiographically-relevant lyrics) fosters social connectedness, which subsequently increases self-esteem, which then boosts optimism. The nostalgic experience is inherently optimistic and paints a subjectively rosier future.Keywords: nostalgia, optimism, emotion, memory, self-esteem, social connectedness Nostalgia and Optimism 3 Back to the Future: Nostalgia Increases OptimismThe capacity for mental time travel is considered uniquely human (Sedikides & Skowronski, 1997;Suddendorf & Corballis, 2007). Recollection of the past, consideration of the present, and projection onto the future are interdependent cognitive processes with a shared neurological substrate (Johnson & Sherman, 1990;Klein, Robertson, & Delton, 2010).Hence, if the present self derives positivity from one's past, as research shows is typically the case in nostalgic reverie (Hepper, Ritchie, Sedikides, & Wildschut, 2012;, this positivity could stretch out in time and produce a brighter outlook on the future. Stated otherwise, when individuals become nostalgic, they may accordingly feel optimistic about their future. We test this proposition while also examining mechanisms through which nostalgia may elicit optimism.
Historical and Contemporary Conceptions of NostalgiaNostalgia has historically been conceptualized as pathological maladaptation to the present reality and as trepidation of the future Sedikides, Wildschut, & Baden, 2004). In the 17 th century, physician Johannes Hofer (1688/1934) coined the term nostalgia to describe physical and psychological symptoms among Swiss mercenaries fighting away from home and for assorted European monarchs. Since then, nostalgia has been labeled a neurological disease (Scheuchzer, 1731) and a psychological disorder (e.g., repressive compulsion, psychosis; Sterba, 1940). The consensus was that nostalgic individuals are preoccupied with bygone events or objects, such that "their longing for the past matches their dislike of the present and their dread of the future" (Castelnuovo-Tedesco, 1980, p.121). In nostalgia, "the past is lost. The future can never be realized. All is empty. All is lost." (Kleiner, 1977, p.472).Nostalgia, then, was long considered a doomed state of mind: an escapist reaction to the demands of the present and an...