Character strength-based interventions: emerging trends and persistent challenges – a systematic review

In order to support psychological well-being and adaptive functioning, character strengths are essential. However, the scope of earlier reviews of character strength interventions has been constrained, frequently focusing on particular populations or outcomes. This necessitates an updated overview that explains how CSI are being developed, provided, and assessed in various contexts and captures new trends. Seven experimental studies, six being randomized controlled trials and one being a single group pre-post study all published in English and peer reviewed journals were included. Major psychology and health databases from January 2020 to August 2024 were utilized. Biases such as randomization, blinding, allocation sequence concealment, selective reporting of results, and others were assessed and evaluated systematically. Character strength intervention is reported to be effective across various populations in fostering well-being, resilience, strength knowledge, strength use, self-efficacy, hope, happiness, and flourishing etc. However, context and population characteristics seem to play a major role in planning a successful intervention. Such as people with MCI, those with acute psychiatric illness or people living under conditions of heightened stress such as during COVID-19 pandemic may have unique needs thus requiring specific modified interventions to ensure feasibility and effectiveness. Also, from this review it was inferred that character strength intervention when combined with other major psychological interventions, works better in channeling inner character strength and sustaining the positive changes for a longer period of time. Though clarity about the integration period needed for single character strength to be observed and nurtured still remains ambiguous. The findings of the review suggest character strength interventions (CSI) support improvement in resilience, well-being and personal growth across a variety of populations and delivery methods. Evidence-based interventions, like mindfulness, wellbeing therapy, and the Aware-Explore-Apply model, demonstrate potential, but more methodological coherence is required. In addition to incorporating culturally sensitive techniques, longer follow-ups, and objective indicators, future research ought to prioritize the need for standardized intervention protocols. Given that only seven studies included in this review, it should be interpreted as an initial, preliminary systematic narrative synthesis identifying trends and gaps that require confirmation in larger, standardized trials.