なぜ人類は「過去の記憶」を美化するのか【ノスタルジアの正体】

Why do we think "those were the good old days"? —The truth is, your brain doesn't remember three-quarters of your life. More than one-third of the memories we can recall in our lives are concentrated in just one-quarter of our lives, from our teens to our twenties. Moreover, those memories aren't accurate. Negative emotions begin to fade after two days, while positive emotions tend to grow stronger over time. Without you realizing it, your brain was rewriting the past to beautify it. Based on 15 papers in the psychology of memory, neuroscience, and evolutionary psychology, we thoroughly dissect the true nature of "those were the good old days." ---------------------------- ▼Timestamps 00:00 - Intro 01:14 - Chapter 1: Why one summer at 16 is more beautiful than ten years in your 30s 02:44 - Chapter 2: Memories are rewritten every time you remember them 05:42 - Chapter 3: Nostalgia was once a disease that took people's lives 07:59 - Chapter 4: Nostalgic songs have a positive effect on the body 10:50 - Chapter 5: You might be longing for an "unknown past" ---------------------------- ▼References [1] Rubin, D. C., Wetzler, S. E. & Nebes, R. D. (1986). "Autobiographical memory across the adult lifespan." In D. C. Rubin (Ed.), Autobiographical Memory. Cambridge University Press. [2] Conway, M. A., Wang, Q., Hanyu, K. & Haque, S. (2005). "A cross-cultural investigation of autobiographical memory." Journal of Cross-Cultural Psychology, 36(6), 739-749. [3] Koppel, J. & Berntsen, D. (2015). "The peaks of life." Journal of Applied Research in Memory and Cognition, 4(1), 66-80. [4] Rathbone, C. J., Moulin, C. J. A. & Conway, M. A. (2008). "Self-centered memories." Memory & Cognition, 36(8), 1403-1414. [5] Mitchell, T. R., Thompson, L., Peterson, E. & Cronk, R. (1997). "Temporal adjustments in the evaluation of events." Journal of Experimental Social Psychology, 33, 421-448. [6] Walker, W. R. & Skowronski, J. J. (2009). "The fading affect bias." Applied Cognitive Psychology, 23, 1122-1136. [7] Kahneman, D. (2011). Thinking, Fast and Slow. [8] Hofer, J. (1688). Dissertatio medica de nostalgia. [9] Wildschut, T., Sedikides, C., Arndt, J. & Routledge, C. (2006). "Nostalgia: Content, triggers, functions." Journal of Personality and Social Psychology, 91(5), 975-993. [10] Routledge, C., Arndt, J., Sedikides, C. & Wildschut, T. (2008). "A blast from the past: The terror management function of nostalgia." Journal of Experimental Social Psychology, 44(1), 132-140. [11] Zhou, X., Wildschut, T., Sedikides, C. et al. (2012). "Heartwarming memories." Emotion, 12(4), 678-684. [12] Zhang, Y. et al. (2022). "Thalamocortical mechanisms for nostalgia-induced analgesia." Journal of Neuroscience, 42(14), 2963-2972. [13] Holbrook, M. B. & Schindler, R. M. (1989). "Development of musical tastes." Journal of Consumer Research, 16(1), 119-124. [14] Yang, Z. et al. (2022). "Patterns of brain activity associated with nostalgia." Social Cognitive and Affective Neuroscience, 17(12), 1131-1144. [15] Sedikides, C. & Wildschut, T. (2025). "On the Nature of Nostalgia." European Review of Social Psychology. --------------------------------- ▼Sound Source Materials Sound Effect Lab https://soundeffect-lab.info/ DOVA-SYNDROME https://dova-s.jp/ #Nostalgia #Memory #Psychology #Neuroscience #ReminiscenceBump #EvolutionaryPsychology #DataScience #Discussion