Seven methodologically diverse studies addressed 3 fundamental questions about nostalgia.Studies 1 and 2 examined the content of nostalgic experiences. Descriptions of nostalgic experiences typically featured the self as a protagonist in interactions with close others (e.g., friends) or in momentous events (e.g., weddings). Also, the descriptions contained more expressions of positive than negative affect and often depicted the redemption of negative lifescenes by subsequent triumphs. Studies 3 and 4 examined triggers of nostalgia and revealed that nostalgia occurs in response to negative mood and the discrete affective state of loneliness.Studies 5, 6, and 7 investigated the functional utility of nostalgia and established that nostalgia bolsters social bonds, increases positive self-regard, and generates positive affect. These findings demarcate key landmarks in the hitherto uncharted research domain of nostalgia.Nostalgia 3

Nostalgia fulfills pivotal functions for individuals, but lacks an empirically-derived and comprehensive definition. We examined lay conceptions of nostalgia using a prototype approach. In Study 1, participants generated open-ended features of nostalgia, which were coded into categories. In Study 2, participants rated the centrality of these categories, which were subsequently classified as central (e.g., memories, relationships, happiness) or peripheral (e.g., daydreaming, regret, loneliness). Central (compared to peripheral) features were more often recalled and falsely recognized (Study 3), were classified more quickly (Study 4), were judged to reflect more nostalgia in a vignette (Study 5), better characterized participants' own nostalgic (vs. ordinary) experiences (Study 6), and prompted higher levels of actual nostalgia and its intrapersonal benefits when used to trigger a personal memory, regardless of age (Study 7). These findings highlight that lay people view nostalgia as a selfrelevant and social blended emotional and cognitive state, featuring a mixture of happiness and loss. The findings also aid understanding of nostalgia's functions and identify new methods for future research.Keywords: nostalgia, prototype, emotions, memory, self Nostalgia 3 Nostalgia is part of the fabric of everyday life. After centuries of scientific neglect, the construct has recently been the focus of burgeoning empirical and theoretical developments. According to Boym (2001), nostalgia is experienced by almost everyone.Indeed, 79% of undergraduates report experiencing nostalgia at least once a week (Wildschut, Sedikides, Arndt, & Routledge, 2006), as do over half of adults in every five-year age cohort from age 18 to 90 (Hepper, Wildschut, Sedikides, Routledge, & Arndt, 2011). Moreover, recent research suggests that nostalgia serves vital psychological functions .Despite emerging evidence for the functional relevance of nostalgia, the mechanisms by which it operates are poorly understood. A major reason for this is that there exists no coherent definition of nostalgia; in fact, its nature has long been the subject of debate. The purpose of the present research is to resolve this debate by uncovering conclusively what "nostalgia" means to people. In particular, we propose that lay persons' views of nostalgia have a prototype structure characterized by a core set of central features. In examining this proposal, we aim to clarify what contemporary scholars have been studying and to provide new directions and methods for studying nostalgia further. Historical Conceptions of NostalgiaThe term "nostalgia" derives from the Greek words nostos, meaning return to one's native land, and algos, meaning pain or suffering: literally, suffering caused by longing to return home. However, the idea existed long before the word. In probably its first exploration in classical literature, the theme of nostalgia runs strongly through Homer's Odyssey, in which the hero Odysseus nurtures memories of Ithaca and his family throughout his lon...

Participants listened to randomly selected excerpts of popular music and rated how nostalgic each song made them feel. Nostalgia was stronger to the extent that a song was autobiographically salient, arousing, familiar, and elicited a greater number of positive, negative, and mixed emotions. These effects were moderated by individual differences (nostalgia proneness, mood state, dimensions of the Affective Neurosciences Personality Scale, and factors of the Big Five Inventory). Nostalgia proneness predicted stronger nostalgic experiences, even after controlling for other individual difference measures. Nostalgia proneness was predicted by the Sadness dimension of the Affective Neurosciences Personality Scale and Neuroticism of the Big Five Inventory. Nostalgia was associated with both joy and sadness, whereas nonnostalgic and nonautobiographical experiences were associated with irritation.

The present research tested the proposition that nostalgia serves an existential function by bolstering a sense of meaning in life. Study 1 found that nostalgia was positively associated with a sense of meaning in life. Study 2 experimentally demonstrated that nostalgia increases a sense of meaning in life. In both studies, the link between nostalgia and increased meaning in life was mediated by feelings of social connectedness. Study 3 evidenced that threatened meaning increases nostalgia. Study 4 illustrated that nostalgia, in turn, reduces defensiveness following a meaning threat. Finally, Studies 5 and 6 showed that nostalgia disrupts the link between meaning deficits and compromised psychological well-being. Collectively, these findings indicate that the provision of existential meaning is a pivotal function of nostalgia.

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