Using Big Data to Study Psychological Constructs: Nostalgia on Facebook

Nostalgia, reflecting on the past, has many aspects. At times, we refer to it as a state of mind as in, I’m nostalgic. At times, as a feeling – I’m feeling nostalgic. We sometimes use nostalgia as a way to deal with “in the present” emotions or feelings. For instance, we reminisce about past holidays to feel better about the present [1]. Nostalgia can be internally or externally activated. Internally, an individual can evoke feelings of nostalgia. On the other hand, external stimuli can evoke nostalgia, such as a song, an ad, or a brand [2-5].