"Realist reviews have emerged as a strategy for synthesising evidence and focuses on providing explanations for why interventions may or may not work, in what contexts, how and in what circumstance...The findings from the synthesis focus on explaining to the reader why (or not) the intervention works and in what ways, to enable informed choices about further use and/or research" (Rycroft-Malone, 2012)
Harniess, P. A., Gibbs, D., Bezemer, J., & Purna Basu, A. (2022). Parental engagement in early intervention for infants with cerebral palsy—A realist synthesis. Child: Care, Health and Development, 48(3), 359-377. Full Text
References
Rycroft-Malone, J., McCormack, B., Hutchinson, A. M., DeCorby, K., Bucknall, T. K., Kent, B., ... & Wilson, V. (2012). Realist synthesis: illustrating the method for implementation research. Implementation Science, 7(1), 1-10. Full Text