Vivid Memory of �When� a Happy Event Happened is Associated with Mental Well-being: A Natural Language Processing Based Study (Preprint)
BACKGROUND Overgenerality or specificity of autobiographical memory is associated with psychological disorders such as major depressive disorder, post-traumatic stress disorder, and drug addiction. Current methods to measure overgenerality rely upon researchers’ subjective judgment, although automatic tools can measure other language-based scores for psychological disorder screening. OBJECTIVE This study was conducted to detect time-specific expressions, an aspect of specificity, in an episode. METHODS We analyzed 7000 episodes reported by 1000 participants via crowdsourcing, using Japanese language parsers to extract time-related expressions. Each participant wrote seven episodes according to seven emotional stimulus words. Three participant groups were made according to their WHO-5 well-being index score. The high well-being score (WB) group and low-WB group were examined to assess time expression usage (high-WB group; WB ≥ 60, n = 367, mean WB = 70.6, std = 10.5: low-WB group; WB ≤ 40, n = 378, mean WB = 27.5, std = 11.4). RESULTS Two-sided Fisher’s exact test revealed that happy episodes with detailed time expressions are significantly more numerous in the high-WB group than in the low-WB group (P = .001), but no significant difference was found for any other pair. CONCLUSIONS Results show that vivid memories about a happy event are associated with mental well-being.