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Is realist evaluation keeping its promise? A review of published empirical studies in the field of health systems research
Abstract
This overview aims to stimulate conceptual and practical discussions to help unlock the full potential of realist evaluation in health systems research. Based on a structured literature search, this review maps how the concepts of realist evaluation are applied in health systems research and which methodological problems are encountered. We found a great diversity in the depth of application of the philosophical concepts, use of terminology and scope of application in the research process. Terms of theory-driven evaluation, theories of change and realist evaluation are often used interchangeably. Diverging views exist regarding the nature of ‘mechanism’ and the difference between mechanism and essential context condition. A lack of methodological guidance was highlighted by many authors. Realist evaluation is slowly gaining traction in health systems research, but more clarity is needed concerning the definitions of mechanisms and context and how the configuration of context, mechanism and intervention can be described and assessed.
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“Marchal et al. [18], in a systematic review on realist evaluation in health systems research, also noted that ToC and realist evaluation were often used together or interchangeably.”
From Using theory of change to design and evaluate public health interventions: a systematic review (2015) · cites this paper as [18]
In the citing paper
“Both a published literature review 112 and critical discussions in the applied literature cite several methodological challenges associated with a RE approach, including deciding what constitutes a mechanism, 127 and indeed differentiating between what is a mechanism and what is context.”
From ReseArch with Patient and Public invOlvement: a RealisT evaluation – the RAPPORT study (2015) · cites this paper as [112]
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What’s in a mechanism? Development of a key concept in realist evaluation
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“Further, as noted in Item 5 above, the evaluation question(s), scope and design may evolve over the course of the evaluation [19].”
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Manzano, A. (2016) · Evaluation · doi:10.1177/1356389016638615 · Cited by 691
Using theory of change to design and evaluate public health interventions: a systematic review
Breuer, E., Lee, L., De Silva, M., & Lund, C. (2015) · Implementation Science · doi:10.1186/s13012-016-0422-6 · Cited by 425
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“Challenges have been identified with regards to the definition and operationalization of mechanisms and context and the empirical testing of CMO-configurations, together with the confusion that some view specific elements as mechanisms while others define them as context and vice versa (Lacouture et al., 2015; Marchal…”
InfluentialGilmore, B., McAuliffe, E., Power, J., & Vallières, F. (2019) · International Journal of Qualitative Methods · doi:10.1177/1609406919859754 · Cited by 296
“Consequently, and as highlighted by several authors (Byng, 2005; Marchal et al., 2012; Salter & Kothari, 2014; Westhorp, 2008), there is little guidance on specific analysis approaches and steps to use within a realist evaluation.”
BackgroundReseArch with Patient and Public invOlvement: a RealisT evaluation – the RAPPORT study
Wilson, P., Mathie, E., Keenan, J., McNeilly, E., Goodman, C., Howe, A., Poland, F., Staniszewska, S., Kendall, S., Munday, D., et al. (2015) · Health Services and Delivery Research · doi:10.3310/hsdr03380 · Cited by 297
“Realist evaluation (RE) is one of several theory-based approaches to evaluation developed within the social sciences, which seeks to address dynamism and context, rather than control for them, to explain more adequately how and, importantly, under what circumstances programmes, interventions or innovations will ‘work’…”
Lacouture, A., Breton, É., Guichard, A., & Ridde, V. (2015) · Implementation Science · doi:10.1186/s13012-015-0345-7 · Cited by 295
“Moreover, two systematic reviews have highlighted all the ambiguity of the concept of mechanism in its comprehension and in its use for evaluating public health interventions [16, 17].”
Understanding ‘context’ in realist evaluation and synthesis
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“While most realist papers clearly highlight that CMO configurations were key to the development of the theories under discussion, most do not actually describe how the CMO configurations then led to those theories [47].”
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“Two important prior publications have systematically shown that many so-called ‘realist evaluations’ were not applying the concepts appropriately and were, as a result, producing potentially misleading findings and recommendations.(12,13)”
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“questioned whether theory-driven evaluation lives up to its promise [47,48], we have found it very useful to apply”
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“Realist evaluation is a methodology used to unpack the black box of implementation [36] by purposively examining the actions required by those involved in an intervention to ensure its success, including participants and those involved in implementation.”
MethodWhat’s in a Realist Configuration? Deciding Which Causal Configurations to Use, How, and Why
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“The aim of a realist review is to develop plausible explanations from patterns of observations that have surfaced from the literature and create transferable theories that inform programme implementation in different settings (Marchal et al., 2012).”
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Interventions to mitigate the effects of poverty and inequality on mental health
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“Hence, we also included realist evaluations, which extend the analyses to include effects of social and historical context [26].”
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“Marchal et al. (2012) explored if realist evaluation studies remained faithful to realist principles and found important gaps that needed to be addressed regarding the reporting of such studies. In response to their findings, while following the tradition of developing guidelines for reporting different types of studi…”
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Haddad, C. R., & Bergek, A. (2022) · Research Policy · doi:10.1016/j.respol.2022.104676 · Cited by 99
Mukumbang, F. C., Marchal, B., Belle, S. V., & van Wyk, B. E. (2018) · BMC Health Services Research · doi:10.1186/s12913-018-3150-6 · Cited by 90
“testable hypotheses of the programme, intervention or policy and testing these hypotheses in identified cases leads to case-specific theories that provide propositions that can be tested and refined [39].”
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“Rather than rely on empty arenas, generic lists or amorphous detail, our approach to understanding context follows realist perspectives of evaluation that emphasize the development of program theories to guide exploration (Pawson and Tilley, 1997; Marchal et al., 2012).”
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“Context Actors or factors that are external to the intervention, occurring independently of the outcome or influencing the outcome [32].”
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“It was found by Marchal and colleagues [58] that in attempting to specify the context-mechanism-outcome configurations while formulating realist programme theories, some authors fail to demonstrate the explanatory nature of”
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Schiller, C. J. (2016) · Nursing Philosophy · doi:10.1111/nup.12107 · Cited by 84
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“Of course the realist evaluation approach has itself been the subject of criticism and is not without limitations (see Marchal et al. 2012; Porter 2015).”
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“Our research strategy of developing middle-range theory based on program implementers’ views is consistent with recommendations from a recent overview of the use of realist evaluation methods in health systems research, which proposes this as an explicit additional step in situations where there is little to inform a-…”
BackgroundExternal Validity and Policy Adaptation: From Impact Evaluation to Policy Design
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How to phrase critical realist interview questions in applied social science research
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“However, realist evaluators face problems when left without an interview starting point, because the phenomena of interest can only be explained very little or not at all by existing theory (Marchal et al. 2012).”
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Masterson‐Algar, P., Burton, C. R., Rycroft‐Malone, J., Sackley, C. M., & Walker, M. F. (2014) · Journal of Evaluation in Clinical Practice · doi:10.1111/jep.12174 · Cited by 67
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“‘Change occurs when interventions, combined with the right contextual factors, release the generative mechanisms’ (Marchal et al., 2012: 202).”
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“Thirdly, some studies have struggled to identify appropriate theories, either because practitioners are unclear about their approach (as with ToC), or because there is insufficient or conflicting academic theory (Adams et al., 2016; Marchal et al., 2012).”
BackgroundInfluentialPerson‐centred care in primary care: What works for whom, how and in what circumstances?
Ahmed, A., van den Muijsenbergh, M. E. T. C., & Vrijhoef, H. J. (2022) · Health & Social Care in the Community · doi:10.1111/hsc.13913 · Cited by 66
“…inherent to realist research, is the lack of conceptual clarity of the constructs context (J. Greenhalgh & Manzano, 2021; Renmans et al., 2020) and mechanisms (Lacouture et al., 2015; Lemire et al., 2019), which makes assigning items to the different constructs difficult (Marchal et al., 2012).”
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“For example, mapping of service provision and networks of support around the care homes suggested additional contexts that led, or did not lead, to a sense of common purpose [13].”
BackgroundMaking implementation science more real
Sarkies, M., Francis‐Auton, E., Long, J. C., Pomare, C., Hardwick, R., & Braithwaite, J. (2022) · BMC Medical Research Methodology · doi:10.1186/s12874-022-01661-2 · Cited by 66
The uncritical realism of realist evaluation
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“…and action are analytically separate, in combination with the deconstruction of context into the mechanisms that constitute it, will clear up much of the methodological confusion that has dogged evaluators attempting to operationalise the CMO formula in their work (vide Marchal et al., 2012).”
BackgroundUnpacking context in realist evaluations: Findings from a comprehensive review
Nielsen, S. B., Lemire, S. T., & Tangsig, S. (2021) · Evaluation · doi:10.1177/13563890211053032 · Cited by 63
“The fifth review by Manzano (2016: 344) describes the sample of studies as the studies included in Marchal et al. (2012) plus “Three more years of published realist evaluations in health.””
BackgroundSupporting general hospital staff to provide dementia sensitive care: A realist evaluation
Handley, M., Bunn, F., & Goodman, C. M. (2018) · International Journal of Nursing Studies · doi:10.1016/j.ijnurstu.2018.10.004 · Cited by 62
Implications of the Changing Conversation About Causality for Evaluators
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Bringing critical realism to nursing practice: Roy Bhaskar's contribution
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“Evaluating complex interventions is methodologically challenging and theory-driven analyses have been demonstrated as being well suited for understanding the workings of complex health system interventions (Campbell et al. 2007; Marchal et al. 2012).”
Randell, R., Greenhalgh, J., Hindmarsh, J., Dowding, D., Jayne, D. G., Pearman, A. D., Gardner, P. H., Croft, J., & Kotzé, A. (2014) · Implementation Science · doi:10.1186/1748-5908-9-52 · Cited by 60
“Realist evaluation is increasingly popular as a method for evaluating the implementation of complex interventions in healthcare [32-36] and has been applied in a variety of fields within health systems research [37].”
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“50 Therefore, realist evaluation can provide a sound framework by which the context and mechanisms and how they in fl uence the outcome of an intervention could be studied.”
BackgroundInfluentialSelf-citationL’approche réaliste pour l’évaluation de programmes et la revue systématique
Robert, É., & Ridde, V. (2014) · Mesure et évaluation en éducation · doi:10.7202/1025741ar · Cited by 83
“(p. 52) Marchal et al. (2012) le rappellent également : « définir le ‘contexte’ et séparer le ‘mécanisme’ du ‘contexte’ reste une tâche difficile».”
InfluentialOn behalf of the FEMHealth team, Witter, S., Boukhalfa, C., Cresswell, J. A., Daou, Z., Filippi, V., Ganaba, R., Goufodji, S. B., Lange, I. L., Marchal, B., et al. (2016) · International Journal for Equity in Health · doi:10.1186/s12939-016-0412-y · Cited by 58
Self-citationLabour inspections and the prevention of psychosocial risks at work: A realist synthesis
Weissbrodt, R., & Giauque, D. (2017) · Safety Science · doi:10.1016/j.ssci.2017.02.012 · Cited by 64
“It is indeed often difficult to distinguish between contexts and mechanisms (Dalkin et al., 2015) or between mechanisms and interventions (Marchal et al., 2012).”
BackgroundAn overview of realist evaluation for simulation-based education
Graham, A., & McAleer, S. (2018) · Advances in Simulation · doi:10.1186/s41077-018-0073-6 · Cited by 57
“This interplay between individuals and the educational programme means that the causal mechanisms are located in the social relations and context as well as the individuals [28].”
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Wye, L., Lasseter, G., Percival, J., Duncan, L., Simmonds, B., & Purdy, S. (2014) · BMC Palliative Care · doi:10.1186/1472-684x-13-37 · Cited by 55
“But few applied examples of realist evaluation exist, as a recent review found only 20 published studies to date [8].”
BackgroundAbildgaard, J. S., Nielsen, K. M., Wåhlin-Jacobsen, C. D., Maltesen, T., Christensen, K. B., & Holtermann, A. (2019) · Human Relations · doi:10.1177/0018726719866896 · Cited by 54
“Mechanisms are not only individual factors (such as change readiness) but also collective factors related to managerial behaviour and culture (Marchal et al., 2012).”
BackgroundMcFaul, H., & FitzGerald, E. (2019) · British Journal of Educational Technology · doi:10.1111/bjet.12850 · Cited by 59
“rarely been applied to the evaluation of educational technology (King et al., 2016; Marchal et al., 2012) and, as an emergent theoretical framework, a settled consensus on its practical application has yet to emerge (Marchal et al.”
BackgroundMethodInfluentialSMEETS, R. G. M., HERTROIJS, D. F. L., MUKUMBANG, F. C., KROESE, M. E. A. L., RUWAARD, D., & ELISSEN, A. M. J. (2022) · The Milbank Quarterly · doi:10.1111/1468-0009.12543 · Cited by 53
Vareilles, G., Marchal, B., Kane, S. S., Petrič, T., Pictet, G., & Pommier, J. (2015) · BMJ Open · doi:10.1136/bmjopen-2015-008614 · Cited by 53
Self-citationBoumans, J., van Boekel, L. C., Baan, C. A., & Luijkx, K. G. (2018) · The Gerontologist · doi:10.1093/geront/gny096 · Cited by 51
Gilmore, B. (2019) · BMJ Global Health · doi:10.1136/bmjgh-2019-001638 · Cited by 55
The contributions of scientific realism and critical realism to realist evaluation
Mukumbang, F. C., de Souza, D., & Eastwood, J. G. (2023) · Journal of Critical Realism · doi:10.1080/14767430.2023.2217052 · Cited by 71
“Please see Correction (http://dx.doi.org/10.1080/14767430.2023.2232661) methodological foundations, especially among novice realist researchers, have been noted (Marchal et al. 2012).”
BackgroundInfluentialThe effect of leadership on public service motivation: a multiple embedded case study in Morocco
Belrhiti, Z., Damme, W. V., Belalia, A., & Marchal, B. (2020) · BMJ Open · doi:10.1136/bmjopen-2019-033010 · Cited by 59
Self-citationRandell, R., Honey, S., Hindmarsh, J., Alvarado, N., Greenhalgh, J., Pearman, A. D., Long, A., Cope, A., Gill, A., Gardner, P. H., et al. (2017) · Health Services and Delivery Research · doi:10.3310/hsdr05200 · Cited by 48
“Consequently, realist evaluation has been used for studying the implementation of a number of complex interventions in health care.(47) In realist evaluation, interventions in and of themselves are not seen as determining outcomes.”
MethodAkuze, J., Annerstedt, K. S., Beňová, L., Chipeta, E. K., Dossou, J., Groß, M. M., Kidanto, H. L., Marchal, B., Alvesson, H. M., Pembe, A. B., et al. (2021) · BMC Health Services Research · doi:10.1186/s12913-021-07155-z · Cited by 44
“4 The realist research cycle [59] Akuze et al.”
BackgroundSelf-citationBergeron, D. A., & Gaboury, I. (2019) · International Journal of Social Research Methodology · doi:10.1080/13645579.2019.1697167 · Cited by 47
“The process of developing of a C-M-O configuration ultimately allows refinement of an initial program theory (Marchal et al., 2012; Ridde et al., 2012) into a more abstract theory, that can facilitate generalization to other contexts (Blaise et al., 2010; Dickinson, 2006; Greenhalgh et al., 2017d;…”
BackgroundMethodInfluentialSrinivas, P. N., Marchal, B., Macq, J., Kegels, G., & Criel, B. (2014) · Frontiers in Public Health · doi:10.3389/fpubh.2014.00089 · Cited by 48
Self-citationKantilal, K., Hardeman, W., Whiteside, H., Karapanagiotou, E. M., Small, M., & Bhattacharya, D. (2020) · BMJ Open · doi:10.1136/bmjopen-2020-037636 · Cited by 43
Chambers, N., Harvey, G., Mannion, R., Bond, J., & Marshall, J. (2013) · Health Services and Delivery Research · doi:10.3310/hsdr01060 · Cited by 47
Herens, M. C., Wagemakers, A., Vaandrager, L., van Ophem, J., & Koelen, M. A. (2016) · Evaluation & the Health Professions · doi:10.1177/0163278716652940 · Cited by 45
“The analysis of qualitative data from interview transcripts is then based on coding in terms of outcomes as observed by respondents, context conditions, and description of underlying mechanisms in the actual intervention (Marchal et al., 2012).”
BackgroundMethodDalkin, S. M., Lhussier, M., Williams, L., Burton, C. R., & Rycroft‐Malone, J. (2018) · Evaluation · doi:10.1177/1356389017749036 · Cited by 55
“…around defining context and mechanisms has raised dilemmas for the evaluator (Pedersen et al., 2012, Astbury and Leeuw, 2010, Jagosh et al., 2013, Marchal et al., 2012) although recent methodological guidelines and publications have come some way in overcoming this (Wong et al., 2016, Wong et…”
Sarkies, M., Francis‐Auton, E., Long, J. C., Partington, A., Pomare, C., Nguyen, H. M., Wu, W., Westbrook, J. I., Day, R. O., Lévesque, J., et al. (2020) · BMJ Open · doi:10.1136/bmjopen-2020-044049 · Cited by 44
Bonell, C., Warren, E., & Meléndez-Torres, G. (2022) · Evaluation · doi:10.1177/13563890221086309 · Cited by 40
“Some realist evaluators are open to the use of quantitative alongside qualitative data to examine mechanisms (Marchal et al., 2012).”
BackgroundInfluentialRealist evaluation: an immanent critique
Porter, S. (2015) · Nursing Philosophy · doi:10.1111/nup.12100 · Cited by 44
“The momentum started around 2009 (Marchal et al., 2012), and since then, the flow of publications has increased dramatically (see e.”
BackgroundRoodbari, H., Nielsen, K. M., & Axtell, C. M. (2023) · Scandinavian Journal of Work and Organizational Psychology · doi:10.16993/sjwop.171 · Cited by 42
Mechanisms for achieving adolescent-friendly services in Ecuador: a realist evaluation approach
Goicolea, I., Coe, A., Hurtig, A., & Sebastiån, M. S. (2012) · Global Health Action · doi:10.3402/gha.v5i0.18748 · Cited by 42
Burton, C. R., & Payne, S. A. (2012) · BMC Palliative Care · doi:10.1186/1472-684x-11-22 · Cited by 41
“In keeping with realist approaches to theory building [25], the higher-level, abstract mechanisms are presented in this paper.”
BackgroundBartlett, Y. K., Haywood, A., Bentley, C. L., Parker, J. C., Hawley, M., Mountain, G. A., & Mawson, S. (2014) · BMC Medical Informatics and Decision Making · doi:10.1186/s12911-014-0109-3 · Cited by 39
“[14,15]), but has recently been adapted for use with health related interventions (including health technology interventions e.”
BackgroundMethodInfluentialProtocol: Realist synthesis of the impact of unemployment insurance policies on poverty and health
Molnar, A., O'Campo, P. J., Ng, E., Mitchell, C., Muntaner, C., Renahy, É., John, A. S., & Shankardass, K. (2014) · Evaluation and Program Planning · doi:10.1016/j.evalprogplan.2014.09.002 · Cited by 41
Enabling conditions for effective marine spatial planning
Zuercher, R., Ban, N. C., Flannery, W., Guerry, A. D., Halpern, B. S., Magris, R. A., Mahajan, S. L., Motzer, N., Spalding, A. K., Stelzenmüller, V., et al. (2022) · Marine Policy · doi:10.1016/j.marpol.2022.105141 · Cited by 38
“Theory-based evaluation [28,29,48,85,97] Various approaches to theory-based evaluation, including realist evaluation, provide avenues for operationalizing this framework.”
MethodAivalli, P., Dada, S., Gilmore, B., Srinivas, P. N., & Brún, A. D. (2025) · Health Policy and Planning · doi:10.1093/heapol/czaf022 · Cited by 57
“Instead, ISC requires an approach that examines generative causation, focusing on how and why specific mechanisms—such as trust-building, resource negotiation, or bureaucratic discretion—produce outcomes under particular conditions (Marchal et al. 2012).”
Metadata
- Authors
- Marchal, B., van Belle, S., van Olmen, J., Hoerée, T., & Kegels, G.
- Affiliations
- ITM-A, Belgium
- BTC, Belgium
- Venue
- Evaluation
- Publisher
- SAGE Publications
- Published
- 2012-04
- Volume
- 18
- Issue
- 2
- Pages
- 192-212
- ISSN
- 1356-3890 (ISSN-L)
- 1461-7153
- OpenAlex
- W2077589521
- Cited by
- 476
- References
- 92
- Citations by year
- 2026: 22 · 2025: 29 · 2024: 41 · 2023: 29 · 2022: 51 · 2021: 64 · 2020: 31 · 2019: 40 · 2018: 37 · 2017: 28 · 2016: 31 · 2015: 34 · 2014: 24 · 2013: 12 · 2012: 3
- FWCI
- 30.83
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Evaluation (publishedVersion)
- Topics
- Social Sciences › Public Administration › Evaluation and Performance Assessment
- Health Sciences › Health Professions › General Health Professions › Health Policy Implementation Science
- Physical Sciences › Mathematics › Statistics and Probability › Advanced Causal Inference Techniques
- Keywords
- realist evaluation, health systems research, mechanisms, context, intervention, theory of change, theory-based evaluation, methodological recommendations, conceptual clarity
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