This refers to the extent to which an intervention or program is implemented as it was originally designed and intended.
Maintaining high fidelity ensures that the intervention’s core components and delivery methods remain consistent with the evidence-based model, which is essential for achieving expected outcomes.
It can be measured by evaluating factors such as adherence to the program protocol, quality of delivery, dosage, and participant engagement or response.
Sources: SAMHSA_NCBI; HRB