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Table 2 Summary of Intervention Fidelity Measures

From: Assessment of fidelity in individual level behaviour change interventions promoting physical activity among adults: a systematic review

NIH BCC Domain (n) Assessment Criteria (n) What measured (n) How Measured (n) Studya
Treatment Design (0) Assess whether intervention protocol/manuals reflect the underlying theoretical model or clinical guidelines (0) N/A N/A N/A
Training providers (2) Assess provider skills acquisition (2) Provider confidence to deliver intervention (1) Provider self-report (1) [46]
   Provider competence to deliver intervention (1) Assessment of provider (1) [42]
  Assess and monitor provider skills maintenance (0) N/A N/A  
Delivery of treatment (51) Assess if provider adhered to intervention plan, or in the case of computer delivered intervention, method to assess participants contact with information (28) Number of email messages delivered (1) Researcher observation (1) [32]
   Number of email messages/intervention materials read/received (3) Participant self-report (3) [32, 40, 41]
   Number of website log ins (4) Automatically tracked (4) [33, 35, 40, 54]
   Number of automated calls (1) Automatically tracked (1) [48]
   Time spent on website (2) Automatically tracked (2) [40, 47]
   Number of pages viewed (2) Automatically tracked (2) [33, 40]
   Number of website modules read (1) Participant self-report (1) [40]
   Provider rating of satisfaction with delivery (2) Provider self-report (2) [50, 52]
   Number of intervention sessions delivered (5) Audio observation (3) [33, 34, 53, 65]
    Researcher observation (1) [48]
    Provider self-report (1) [48]
   Time of intervention sessions delivered (6) Audio observation (3) [33, 65],
[34]
[53]
    Provider self-report (3) [52]
[36]
[43]
   Percentage of intervention script adhered to (1) Researcher observation (1) [49]
  Assess non-specific treatment effects (6) Rating of provider spirit/competence (4) Audio observation (4) [34, 37, 48, 53]
   Participant rating of provider support (2) Provider self-report (2) [36, 39]
  Assess whether or not the active ingredients were delivered (15) Rating of intervention components delivered (2) Audio observation (1) [43]
    Provider self-report (1) [43]
   Checklist of intervention components delivered (7) Researcher observation (2) [33, 51]
    Audio observation (1) [48]
    Provider self-report (4) [38, 42, 43, 52],
   Number of intervention components delivered (6) Audio observation (5) [34, 37, 38, 48, 53]
    Provider self-report (1) [36]
  Assess whether or not proscribed components were delivered (e.g. components that were unnecessary or unhelpful) (3) Number of proscribed intervention components delivered (3) Audio observation (3) [34, 37, 48]
Receipt of Treatment (4) Assess degree to which participants understood intervention (1) Participant perceived understanding of intervention skills (1) Participant self-report (1) [50]
  Assess participants ability to perform the intervention skills (3) Participant demonstration of knowledge or skills acquired (1) Researcher observation (1) [49]
   Participant perceived efficacy to perform intervention skills (2) Participant self-report (2) [38, 50]
Enactment of treatment skills (8) Assess participant performance of intervention skills in setting in which the intervention is applied (8) Number of participants using intervention materials (e.g. log books, worksheets, pedometers) (3) Participant Self report (2) [32, 41]
    Automatically tracked (1) [48]
   Number of times intervention materials used (e.g. log books, worksheets, pedometers, online self-monitoring) (2) Automatically tracked (2) [35, 53]
   Checklist of participant use of specified intervention techniques (e.g. action planning, self-monitoring) (2) Participant Self report (2) [35, 38]
   Participant rating of agreement with using intervention techniques (1) Participant Self report (1) [50]
  1. aSome studies contain multiple measurement approaches