The Psychology of Nostalgia - Wildschut et al.'s Discoveries
For a long time, nostalgia was treated as a pathological emotion. When Swiss physician Johannes Hofer first coined the term in the 17th century, nostalgia was considered a "disease" afflicting soldiers separated from their homeland. However, the groundbreaking research by Wildschut et al. (2006) demonstrated that nostalgia serves psychologically adaptive functions.
In Wildschut and colleagues' studies, participants who were induced to feel nostalgia, compared to control groups, showed (1) increased self-esteem, (2) a stronger sense of social connectedness, (3) heightened meaning in life, and (4) greater positive affect. Particularly important was the content analysis of nostalgic memories, which revealed that the majority of nostalgic memories contain social contexts. What people feel nostalgic about is not "places" or "things" but "connections with other people."
In the context of romantic relationships, nostalgia for shared memories with a partner strengthens the motivation to continue the relationship. Recollections such as "that time was so much fun" or "we did that together" maintain the conviction that "this relationship has value" even when the current relationship faces difficulties. This aligns with nostalgia's function of providing "existential security."
Shared Memories and Relationship Identity
Alea & Vick (2010) demonstrated that a couple's shared memories are essential for the formation of relationship identity. Relationship identity refers to the shared narrative of "what kind of couple are we?" This narrative is constructed from memories of shared experiences.
Relationship identity functions as an "anchor" when couples face difficulties. Narratives such as "we have overcome similar challenges before" or "we have grown together" provide confidence and motivation to overcome present problems. Conversely, couples with few shared memories (short relationship duration, limited shared experiences) find it harder to identify "reasons" to maintain the relationship when facing adversity.
What is fascinating is that relationship identity is not "objective fact" but a "co-constructed narrative." Even for the same event, how a couple interprets and retells it determines its contribution to relationship identity. For example, whether a travel mishap is narrated as "that was the worst" or "it was tough, but we got through it together" produces diametrically opposite effects on the relationship.
The Psychological Effects of Reminiscing About "That Time"
The act of couples jointly recalling past shared experiences - joint reminiscence - produces multiple psychological effects. First is emotional re-experiencing. When recounting enjoyable memories together, the positive emotions from that time are partially reactivated. This can be likened to withdrawing from an "emotional savings account," injecting positive feelings into the current relationship.
Second is the strengthening of shared reality. By narrating the same event together, the sense that "we share the same world" intensifies. This provides the psychological safety that forms the foundation of the relationship. According to Echterhoff et al.'s (2009) shared reality theory, sharing and mutually confirming experiences with others is a fundamental human cognitive need.
Third is confirmation of relational continuity. Looking back at the past strengthens the sense that "our relationship has continued through time." This serves an especially important function when feeling insecure about the relationship (after conflicts, after long periods apart).
Fourth is rediscovery of the partner. In the process of sharing past memories, one may learn new things about the partner's perspective or emotions. Discoveries like "actually, I felt this way at that time" deepen understanding of the partner and enhance intimacy.
Big Five Personality and Reminiscence Tendencies
Personality traits influence tendencies toward nostalgia and reminiscence. Understanding how each trait relates to reminiscence behavior enables more effective joint reminiscence with a partner.
People high in Openness tend to enjoy reminiscence the most. They excel at richly reconstructing past experiences and finding new meanings in them. Because they can reinterpret the same memory from new angles no matter how many times it is recounted, reminiscence becomes an activity that "never gets old." Additionally, high-openness individuals tend to retain sensory memories (smells, sounds, colors) vividly, resulting in stronger emotional re-experiencing during reminiscence.
People high in Extraversion prefer reminiscence in social contexts. They enjoy sharing "remember when..." stories with friends or partners, positioning reminiscence as a social activity. Introverted individuals, on the other hand, may prefer quiet, solitary reminiscence and may not be enthusiastic when a partner suggests "let's talk about old times together."
People high in Neuroticism have an ambivalent relationship with nostalgia. On one hand, they tend to immerse themselves in nostalgia as an escape from current anxiety or dissatisfaction; on the other hand, past memories also carry the risk of evoking negative emotions (regret, sense of loss). When engaging in joint reminiscence with a highly neurotic person, it is important to focus on positive memories and construct a narrative of continuity - "that experience made us who we are today" - rather than a comparison of "things were better back then (and now they're not)."
How Sharing Photos and Videos Affects Relationships
In the digital age, photos and videos have become the most accessible "external memory devices" for shared memories. A smartphone's camera roll contains a couple's history recorded visually. The impact of these visual records on relationships has attracted researchers' attention.
The act of looking through photos together serves as a powerful trigger for joint reminiscence. Visual cues promote more vivid memory reactivation than verbal cues. A conversation beginning with "do you remember this photo?" triggers a chain of recollections - the emotions, conversations, and physical sensations of that time. Research suggests that couples who regularly review past photos together tend to have higher relationship satisfaction. Related books can also be found at related books (Amazon).
However, excessive photo-taking requires caution. A phenomenon has been reported where focusing on "taking photos" impairs immersion in "the experience itself." This is called the "photo-taking impairment effect," which shows that memory of photographed subjects becomes less accurate than when no photo was taken. In couple experiences as well, constantly holding a camera risks diluting the sharing of "this present moment" with a partner.
The optimal balance is to record the "beginning" and "highlights" of an experience while immersing oneself in the experience for the remaining time. Additionally, consciously setting aside time to review photos together at a later date allows photos to fulfill their function as "triggers for reminiscence" rather than mere "records."
How to Handle Negative Shared Memories
Not all shared memories are positive. Couples also have negative shared memories involving conflict, betrayal, loss, and hardship. How these memories are handled significantly affects the health of the relationship.
Research shows that negative shared memories are processed in two distinct ways. The first is reframing them as a "redemption narrative." This involves constructing a story that connects negative experiences to positive outcomes: "Through that difficulty, we became stronger" or "Because of that experience, we are who we are today." According to McAdams' (2006) research, people who can narrate life's difficulties as redemption stories have higher psychological well-being.
The second is when they become fixed as a "contamination narrative." In this pattern, the negative experience "contaminates" the entire relationship: "Because of that incident, our relationship was broken" or "Since then, I haven't been able to trust." This narrative pattern is strongly associated with decreased relationship satisfaction.
The crucial point is that even for the same event, which narrative it becomes is a matter of choice. Much of couples therapy involves the process of reconstructing contamination narratives into redemption narratives. However, this is not about "pretending the negative experience never happened" but rather shifting focus to "what we learned from that experience and how we grew."
The Psychological Significance of Anniversaries
Anniversaries (dating anniversaries, wedding anniversaries, the day of a first date, etc.) are institutionalized opportunities for reminiscence that periodically reactivate a couple's shared memories. The act of celebrating anniversaries carries psychological significance beyond mere "events."
First, anniversaries are rituals that confirm the temporal continuity of the relationship. The recognition that "one year ago today, we met" serves as evidence that the relationship has persisted through time, reinforcing the expectation that it will continue into the future. Second, anniversaries are signals of investment in the relationship. Remembering an anniversary and preparing a celebration itself becomes a message that "I value this relationship." Third, anniversaries are opportunities to create new shared memories. The celebration itself becomes a new memory, and the following year's anniversary includes that memory in its reminiscence - this cumulative layering of memories enriches the relationship.
Fourth, anniversaries are also opportunities to update the relationship's "story." The chain of anniversary memories - "on our first anniversary we went to that restaurant," "on our third we took a trip" - structures the relationship's history and gives chapters to "our story." According to McAdams' (2001) narrative identity theory, people find meaning by composing their lives as stories. Anniversaries function as "milestones" in this story composition, conferring temporal structure and meaning upon the relationship.
However, mismatched expectations about anniversaries can become a source of couple conflict. When one partner places great importance on anniversaries while the other does not, "forgetting" or "not preparing anything" can cause deep hurt. This mismatch can be prevented by explicitly discussing expectations about anniversaries in advance. In relation to the Big Five, highly conscientious people tend to plan anniversary preparations methodically, while highly open people prefer surprises and creative celebrations. Understanding a partner's personality traits and finding anniversary celebrations that satisfy both parties is essential.
The Importance of Intentionally Creating New Memories
The "savings" of shared memories need to be consciously increased over time. As relationships lengthen, daily routines become dominant and memorable new experiences decrease. This is related to the "acceleration of time" (the sensation that time passes faster with age) - the fewer novel experiences there are, the fewer events are stored in memory, and time feels "empty."
According to Aron et al.'s (2000) self-expansion theory, couples engaging in new and exciting activities together directly increases relationship satisfaction. This occurs because novel experiences activate the dopamine system, and that excitement is attributed to the partner relationship (misattribution effect). In other words, doing new things together makes being with the partner itself feel "exciting."
As concrete practices, the following are suggested. Plan "first-time" experiences regularly: Incorporate places you've never been, foods you've never tried, and activities you've never done at least once a month. Share "challenges": Activities that require cooperation - cooking classes, sports, travel - strengthen bonds through shared accomplishment. Create "the extraordinary within the ordinary": Even without grand events, small departures from routine - walking a different path, buying flowers on a surprise weekday - become memorable experiences.
As Wildschut et al.'s (2006) research demonstrates, memories that will become objects of future nostalgia arise from experiences containing "social connection" and "positive emotion." Accumulating new experiences accompanied by positive emotions together with a partner builds the "memory savings" that will support the future relationship.
The "Editing" of Shared Memories and Narrativizing the Relationship
A couple's shared memories are not objective records of fact but narratives "edited" collaboratively. Even when experiencing the same event, two people's memories differ subtly (and sometimes greatly). This memory discrepancy is not a problem but rather an indicator of the relationship's richness.
According to Hirst & Echterhoff's (2012) collective memory research, memories are "socially shaped" through the process of sharing them within a group. As a couple discusses "that's how it was, right?", both parties' memories gradually converge and become integrated as "our memory." This integration process itself contributes to the construction of relationship identity.
However, there are points to be cautious about in the "editing" of memories. When one partner becomes dominant as the "narrator" of memories, there is a risk that the other's memories and interpretations are suppressed. In healthy joint reminiscence, both parties' memories and interpretations are equally respected, and a polyphonic narrative is permitted: "That's how you remember it. I remember it this way." As Wildschut et al.'s (2006) research suggests, nostalgia is "selective" - people tend to selectively recall positive elements of the past. This selectivity is adaptive, but excessive idealization carries the risk of leading to dissatisfaction that "things were better before." Balanced reminiscence means enjoying the good aspects of the past while directing equal attention and investment toward the present relationship.