Firm, yet flexible: a fidelity debate paper with two case examples

Area of Science:

• Implementation Science
• Healthcare Research
• Health Services Research

Background:

• Intervention and implementation fidelity are crucial for the accurate interpretation of complex healthcare interventions.
• Historically, strict adherence to core components was emphasized, but flexibility is increasingly recognized as necessary.
• Evaluating fidelity ensures research-supported interventions and strategies are delivered as intended.

Purpose of the Study:

• To explore the tensions in defining and measuring intervention and implementation fidelity in healthcare research.
• To discuss the challenges of balancing firmness and flexibility in fidelity assessments.
• To draw on experiences from developing fidelity assessments in hybrid trials.

Main Methods:

• The paper is a debate paper drawing on experiences from developing fidelity assessments.
• It explores tensions in conceptualizing and measuring fidelity.
• It considers subjective reasoning, context-dependency, and multi-level fidelity criteria.

Main Results:

• Fidelity decisions require transparency, often using theory or logic models.
• Fidelity is context-dependent, necessitating study-specific conceptualizations and a balance of firmness and flexibility.
• There's a growing need to define fidelity at organizational and system levels, not just individual behaviors.

Conclusions:

• Contemporary fidelity assessment demands expanded frameworks including organizational and system levels.
• Pragmatic approaches for assessing fidelity in research and practice are needed.
• Continued research is vital to balance firmness and flexibility in implementation science.