Objectives: This study aims to review the use of reminiscence interventions in the reduction of loneliness in older adults by categorising the interventions by type, and comparing their effectiveness and methodological quality.

Method: This is a systematic review following PRISMA guidelines. The search was restricted to studies published in the Cochrane, CINAHL, Web of Science, Psycarticles, Psycinfo, and PubMed databases until December 2022. The inclusion criteria for the studies included in this review were: 1) reminiscence intervention 2) loneliness outcome measure 3) adults over 60 years old 4) experimental, pre-experimental, and quasi-experimental studies.

Results: A total of twelve studies were eligible for inclusion. Only nine studies included a control group, and seven of those report significant effectiveness in reducing loneliness levels. The most popular type of intervention is simple reminiscence and life review, and in-group format. The interventions to date have been very heterogeneous, and the methodological quality of the existing literature is moderate to weak.

Conclusion: While reminiscence interventions hold some promise for reducing loneliness levels among older adults, future methodologically rigorous research is required, and standardised protocols need to be developed for application, with the specific aim of reducing levels of loneliness among older adults.