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Pulling apart the
                        Population health intervention black box:
                              The concept of mechanism
                          from a realist evaluation perspective.
                                       Anthony Lacouture 1, Eric Breton 1, Val辿ry Ridde 2, Anne Guichard 3
                                                            1. EHESP School of Public Health, Rennes, France
                                             2. Montreal University Hospital Research Centre CRCHUM, Montreal, Canada
                                         3. National Institute for Prevention and Health Education INPES, Saint Denis, France

  To open the intervention
  black box, 3 reading keys                                                    M
                                                            Agency                  Structure
  per mechanism (M):                                                                                   O
                                                              Intervention black box
        FORCE / POWER                                                                          C                         DYNAMIC PROCESS
      Generative causation                         RELATION /                                                              Implementation
   M hidden, but real                             INTERACTION                                                        Anteriority/History
   M produces outcomes (O)                                                                                           Temporality
                                                    Interrelationships Agency/Structure
   M depends on context (C)
                                                   M: Reasoning/Resources
   Existence of families of
                                                   M: Reactions
    mechanisms                                   Logic of intervention

  For Whom ?                                                                                                                              What ?
       Actors in Population health (PH) intervention                                 Challenges of complex intervention
        (Stakeholders, researchers, practitioners)                                  evaluation
                                                                                         Complex nature of context-dependant
       Acting at different levels of intervention
                                                                                           intervention
        (Practice, programme, policy)                                                   Shortfalls of (quasi) experimental
      Involved in different issues                                                         evaluation design
                                                                                         Realist approach: a theory-based
         (Health system management, Health
                                                                                           evaluation (Pawson & Tilley, 1997)
         promotion, Healthcare access)
                                                                                              Context-Mechanism-Outcomes configuration



      Scoping study                                                                       Defining the concept of mechanism
        Exploratory study of the grey and scientific                                      No consensus about the definition
         literature                                                                        Clarification is required for a more
        Conceptual analysis: term, sense, referent                                         coherent use (Marchal et al, 2012)
          (Gerring, 1999; Sartori, 2009; Daigneault & Jacob, 2012)                         Very recent debate in PH evaluation
        57 documents included (out of 1442                                                The proponents of the realist approach
         references) featuring an implicit or explicit                                      have suggested a general methodological
         definition of mechanism                                                          framework rather than a strict one

  How ?                                                                                                                                     Why ?
                                                    5th Annual European Public Health Conference
                                                            7-12 November 2012, Malta
This study is a component of the AAPRISS programme carried out by:                      This study was funded by the French National Research Agency (ANR)
Eric Breton, PhD: Eric.Breton@ehesp.fr
Val辿ry Ridde, PhD: Valery.Ridde@umontreal.ca
Anne Guichard, PhD: Anne.Guichard@inpes.sante.fr
Anthony Lacouture, MSc: Anthony.Lacouture@ehesp.fr

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Pulling apart the Population health intervention black box: The concept of 'mechanism' from a realist evaluation perspective

  • 1. Pulling apart the Population health intervention black box: The concept of mechanism from a realist evaluation perspective. Anthony Lacouture 1, Eric Breton 1, Val辿ry Ridde 2, Anne Guichard 3 1. EHESP School of Public Health, Rennes, France 2. Montreal University Hospital Research Centre CRCHUM, Montreal, Canada 3. National Institute for Prevention and Health Education INPES, Saint Denis, France To open the intervention black box, 3 reading keys M Agency Structure per mechanism (M): O Intervention black box FORCE / POWER C DYNAMIC PROCESS Generative causation RELATION / Implementation M hidden, but real INTERACTION Anteriority/History M produces outcomes (O) Temporality Interrelationships Agency/Structure M depends on context (C) M: Reasoning/Resources Existence of families of M: Reactions mechanisms Logic of intervention For Whom ? What ? Actors in Population health (PH) intervention Challenges of complex intervention (Stakeholders, researchers, practitioners) evaluation Complex nature of context-dependant Acting at different levels of intervention intervention (Practice, programme, policy) Shortfalls of (quasi) experimental Involved in different issues evaluation design Realist approach: a theory-based (Health system management, Health evaluation (Pawson & Tilley, 1997) promotion, Healthcare access) Context-Mechanism-Outcomes configuration Scoping study Defining the concept of mechanism Exploratory study of the grey and scientific No consensus about the definition literature Clarification is required for a more Conceptual analysis: term, sense, referent coherent use (Marchal et al, 2012) (Gerring, 1999; Sartori, 2009; Daigneault & Jacob, 2012) Very recent debate in PH evaluation 57 documents included (out of 1442 The proponents of the realist approach references) featuring an implicit or explicit have suggested a general methodological definition of mechanism framework rather than a strict one How ? Why ? 5th Annual European Public Health Conference 7-12 November 2012, Malta This study is a component of the AAPRISS programme carried out by: This study was funded by the French National Research Agency (ANR) Eric Breton, PhD: Eric.Breton@ehesp.fr Val辿ry Ridde, PhD: Valery.Ridde@umontreal.ca Anne Guichard, PhD: Anne.Guichard@inpes.sante.fr Anthony Lacouture, MSc: Anthony.Lacouture@ehesp.fr