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[1] Zeng, Y., et al. (2023). "The effects of gratitude interventions: a systematic review and meta-analysis." BMC Psychology, (64ã®ç¡äœçºåæ¯èŒè©Šéšãçµ±åããæè¬ãžã®ä»å
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[2] Reflection.app (2026). "Science-Backed Benefits of Journaling for Mental Health: Evidence-Based Research Studies." (æç« åãšãžã£ãŒããªã³ã°ã®å¿çç广ã«çžé¢ããªãããšã瀺ãè€æ°ã®èšåºããŒã¿)
[3] åœç«ç ç©¶éçºæ³äººæ
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[4] Scullin, M. K., et al. (2018). "The Effects of Bedtime Writing on Difficulty Falling Asleep: A Polysomnographic Study Comparing To-Do Lists and Completed Activity Lists." Journal of Experimental Psychology: General. (å°±å¯åã®To-Doãªã¹ãäœæãå
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