Motivational Interviewing Fidelity Coding
Also known as: MITI, Motivational Interviewing Treatment Integrity, MI Fidelity Coding, MI Treatment Integrity
Motivational interviewing fidelity coding measures how faithfully and skillfully a practitioner delivers motivational interviewing (MI), the collaborative, change-talk-oriented counseling style. The dominant system, the Motivational Interviewing Treatment Integrity (MITI) code developed by Theresa Moyers, William Miller, and colleagues, has trained raters listen to recorded sessions and produce global ratings of the clinician's MI spirit alongside counts of specific behaviors, which combine into summary indices benchmarked against competency thresholds — making it a worked example of practice-specific treatment fidelity.
Key highlights
- Provides an objective, observation-based measure of MI delivery rather than relying on self-report.
- Combines holistic global ratings of MI spirit with concrete, countable behavior tallies.
- Comes with established competency benchmarks, enabling certification and comparison across coders and studies.
- Generates specific, behaviorally grounded feedback that directly guides MI training and supervision.
Intuition
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How it works
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When to use it
Use MITI coding whenever you need to verify that motivational interviewing is being delivered competently — in MI training and certification, in trials where MI is the intervention (to document fidelity), and in supervision and quality assurance. It requires recorded sessions, trained coders, and attention to inter-rater reliability. It is not appropriate for assessing non-MI approaches, for live unrecorded sessions, or when resources cannot support the coding workload, though briefer self-assessment or supervision checklists can offer a lighter-weight, less rigorous alternative.
Strengths & limitations
- Provides an objective, observation-based measure of MI delivery rather than relying on self-report.
- Combines holistic global ratings of MI spirit with concrete, countable behavior tallies.
- Comes with established competency benchmarks, enabling certification and comparison across coders and studies.
- Generates specific, behaviorally grounded feedback that directly guides MI training and supervision.
- Coding is labor-intensive and requires trained, calibrated raters to achieve acceptable reliability.
- Captures only a sampled segment of a session, which may not represent the whole encounter.
- Global ratings involve judgment and can vary between coders despite training.
- High MITI scores indicate skillful MI delivery, not that MI is the right intervention or that it produced change.
Common pitfalls
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Applications
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Frequently asked
What does the reflection-to-question ratio tell you?
It captures a core MI skill: proficient MI leans on reflective listening rather than interrogation. The reflection-to-question ratio compares how often the clinician reflects the client's statements versus asks questions; a higher ratio indicates a more reflective, MI-consistent style. MITI also examines the percentage of reflections that are complex (adding meaning) rather than simple. These summary indices, with the global ratings, distinguish beginning from competent MI practice against the code's benchmarks.
Is the MITI the same as motivational interviewing itself?
No. Motivational interviewing is the counseling approach; the MITI is a separate instrument for measuring how faithfully and skillfully that approach is delivered. The MITI does not teach or define MI practice so much as evaluate it from recorded sessions, serving the fidelity and quality-assurance function. This is why it is catalogued as a fidelity-coding method rather than as the MI intervention.
Why must MITI use recorded sessions?
Because fidelity requires observing what actually happened, not what the clinician believes happened. Self-report of MI delivery is unreliable — clinicians routinely overestimate their MI-consistency. Recording a session lets a trained, independent coder count behaviors and rate global dimensions on the real interaction, with the recording also enabling reliability checks between coders. Live coding is possible but loses the ability to review and verify, which recordings provide.
Sources
- 1.Moyers, T. B., Rowell, L. N., Manuel, J. K., Ernst, D., & Houck, J. M. (2016). The Motivational Interviewing Treatment Integrity Code (MITI 4): Rationale, preliminary reliability and validity. Journal of Substance Abuse Treatment, 65, 36–42.
- 2.Moyers, T. B., Martin, T., Manuel, J. K., Hendrickson, S. M. L., & Miller, W. R. (2005). Assessing competence in the use of motivational interviewing. Journal of Substance Abuse Treatment, 28(1), 19–26.
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Cite this page
ScholarGate. (2026, June 22). Motivational Interviewing Fidelity Coding. ScholarGate. https://scholargate.app/social-work/motivational-interviewing-fidelity