Background: Emerging literature shows that nostalgia induced by autobiographical reflection and music confers psychological benefits to people living with dementia. Objective: Our objective was to test the potential benefits of nostalgic landmarks for people living with Alzheimer's disease. Methods: We displayed the landmarks as wall-mounted pictures within a virtual environment. In Experiment 1, we developed the nostalgia manipulation by using pictures associated with the decade during which participants lived most of their childhood. To examine the effectiveness, tolerability, and safety of this pictorial nostalgia induction, we conducted the experiment with 172 healthy adults. In Experiment 2, we recruited 20 participants living with Alzheimer's disease who experienced mild to moderate cognitive impairments. We further personalized the pictorial nostalgia induction by interviewing them about fond memories from their past and generating images corresponding to these events. We hypothesized that navigating a virtual environment with wall-mounted nostalgic (compared to control) pictures would confer psychological benefits. Results: The nostalgic (versus control) pictures evoked higher levels of momentary nostalgia; the manipulation was successful (Experiments 1 and 2). Compared to control pictures, nostalgic pictures significantly increased self-reported positive (but not negative) affect, self-esteem, self-continuity, social connectedness, and meaning in life (Experiments 1 and 2). Participants in the nostalgia condition (compared to controls) evinced better picture recognition, but not improved spatial memory (Experiment 2). Conclusions: Our findings demonstrate that nostalgic landmarks confer psychological benefits and enhance picture recognition among people living with Alzheimer's disease. This work has real-world applications for dementia-friendly design and therapy-related practices.
