Enter information for authors (including designations, affiliations, correspondence, contributions) Vivid Memory of "When" a Happy Event Happened is Associated with Mental Well-being: A Natural Language Processing Based Study AbstractBackground: Overgenerality or specificity of autobiographical memory is associated with psychological disorders such as major depressive disorder, posttraumatic 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.