From comprehensive theoretical models, interventions based on character strengths are considered promising tools for the development of work engagement and performance (Bakker & Demerouti, Journal of Occupational Health Psychology, 22(3), 273, 2017; Salanova et al., 2006). However, there is a gap in scientific research regarding these interventions in the workplace context. The aim of the present study is to assess the efficacy of character strengths-based interventions in increasing work engagement and job performance. For this purpose, a meta-analysis focusing on repeat measures studies with experimental or quasi-experimental design and control group was conducted, providing a more accurate assessment of the long-term effects of the interventions. This methodology represents an innovative strategy, considering the widespread trend of conducting cross-sectional studies in the field of intervention on organizational psychology. The search was carried out in the Web of Science, Scopus, and ProQuest databases, following the PRISMA guidelines. Publications between January 2004 and May 2024 were analyzed. Out of 963 initial studies, only seven met the inclusion criteria, finding small effects on work engagement (d = 0.37) and job performance (d = 0.27). The results suggest that interventions focused on character strengths are effective in improving work engagement and job performance. Finally, the theoretical and practical implications of the study are discussed.
