Table 1.

Four components of fidelity

Elements of fidelity	Methods of measuring
Design Key components of treatment	Treatment manual Detailed description of protocol or reference to previously used protocol
Provider training	Report credentials Report training of specific treatment protocol and competency (defined a priori) Report how providers were monitored and received feedback during intervention
Administration Quantity (dosage) of components and quality of adherence to protocol	Protocol checklists Provider self-report Video/audio coding Report reliability
Treatment receipt	Report attendance Report home practice Engagement rating from parents or treatment providers or researchers Exit interview