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Related Experiment Video

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Methods to Test Visual Attention Online
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A novel method for assessing design fidelity in web-based behavioral interventions.

Jeffrey D Lambert1, Lewis R Elliott2, Adrian H Taylor3

  • 1Department for Health, University of Bath.

Health Psychology : Official Journal of the Division of Health Psychology, American Psychological Association
|February 25, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a new method to assess design fidelity in behavioral interventions, ensuring that intervention components like behavior change techniques (BCTs) are implemented as intended. The eMotion intervention showed high agreement for most BCTs, highlighting the method's utility.

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Area of Science:

  • Behavioral science
  • Intervention fidelity
  • Digital health

Background:

  • Assessing delivery fidelity is common in behavioral interventions, but evaluating design fidelity (how well protocols reflect theoretical principles) is under-researched.
  • This gap limits understanding of whether interventions are truly operationalizing intended mechanisms.

Purpose of the Study:

  • To present a systematic method for assessing design fidelity.
  • To apply this method to the eMotion web-based intervention, which targets physical activity and depression.

Main Methods:

  • An independent rater coded behavior change techniques (BCTs) within the eMotion intervention's 13 web-based modules.
  • Coding results were compared against the designers' specifications to determine interrater reliability.

Main Results:

  • High agreement (AC1 = 0.91) was found for BCTs related to behavioral activation.
  • High agreement (AC1 = 0.88) was observed for BCTs targeting physical activity.
  • Lower agreement was noted for 'demonstration of behavior' and 'monitoring of emotional consequences' BCTs, leading to amendments in the intervention description.

Conclusions:

  • A novel method for assessing design fidelity was successfully demonstrated.
  • Researchers developing multicomponent interventions are encouraged to adopt and refine this method to ensure intended operationalization of BCTs.