Effect of Reminiscence Therapy Based on Positive Nostalgia Resources on Subthreshold Depression in the Elderly

INTERVENTION: Positive Reminiscence Group:The Positive Reminiscence Group was administered standardized reminiscence therapy based on positive nostalgic resources, where the reminiscence intervention for participants was delivered through a structured reminiscence resource library constructed with high‐arousal positive emotions as memory retrieval cues.;Traditional Reminiscence Group :The Traditional Reminiscence Group was administered intervention for participants using conventional reminiscence resource that had not undergone the standardization of emotional valence and arousal level.;Waitlist Control Group:The Waitlist Control Group received no study‐related interventions during the intervention period, and only maintained their routine daily activities and basic care.; CONDITION: Subthreshold Depression PRIMARY OUTCOME: Depressive symptoms; SECONDARY OUTCOME: Anxiety symptoms;Life satisfaction;Positive and Negative Affect;Self‐identity;Level of hope; INCLUSION CRITERIA: 1. Aged >= 60 years; 2. Have resided in the elderly care institution for >= 6 months; 3. Scored >= 16 and < 26 on the Chinese version of the Center for Epidemiologic Studies Depression Scale (CES‐D); 4. Scored >= 6 on the 15‐item Geriatric Depression Scale (GDS‐15); 5. Provided informed consent and volunteered to participate in this study.