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Monthly Teacher Impairment Rating Scale
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About Monthly Teacher Impairment Rating Scale
Scale Name
Monthly Teacher Impairment Rating Scale
Author Details
Fabiano, G. A., Pelham, W. E. Jr., Waschbusch, D. A., Gnagy, E. M., Lahey, B. B., Chronis, A. M., & Burrows-MacLean, L.
Translation Availability
Not Sure

Background/Description
The Monthly Teacher Impairment Rating Scale (MTIRS) was developed by Fabiano et al. to assess functional impairments in students within a classroom setting, especially those with Attention-Deficit/Hyperactivity Disorder (ADHD). The MTIRS provides teachers with a structured way to observe and document a student’s performance and behavior relative to their peers over time, offering insights into the impacts of ADHD symptoms and associated behaviors on academic and social functioning.
The MTIRS is particularly valuable for monitoring treatment progress and evaluating how ADHD symptoms affect classroom behaviors, relationships with peers, and academic performance.
Administration, Scoring and Interpretation
- Obtain the MTIRS: You can obtain the MTIRS from various sources, including online databases, research institutions, or by contacting the author directly. Ensure you have the most recent version of the scale.
- Explain the Purpose of the Scale: Clearly explain to the teacher that the MTIRS is a self-report questionnaire designed to assess a student’s functional impairment across various domains, including relationships, academic progress, and classroom behavior. Reassure them that their responses are confidential and will be used solely for assessment purposes.
- Provide Instructions: Provide clear and concise instructions on how to complete the MTIRS. Explain that they should rate the student’s level of impairment for each item on a scale of 0 to 3, where 0 indicates no impairment, and 3 indicates severe impairment.
- Administer the Scale: Allow the teacher to complete the MTIRS independently. You may choose to administer it in person, or you can provide the teacher with a copy to complete at home and return later.
Reliability and Validity
- Reliability: The MTIRS demonstrates good internal consistency and test-retest reliability, making it a stable measure for evaluating classroom impairment consistently over time.
- Validity: The scale has shown strong validity across school-based samples, and its scores correlate with other established measures of ADHD and impairment, affirming its practical utility in educational settings.
Available Versions
08-Items
Reference
Fabiano, G. A., Pelham, Jr, W. E., Waschbusch, D. A., Gnagy, E. M., Lahey, B. B., Chronis, A. M., … & Burrows-MacLean, L. (2006). A practical measure of impairment: Psychometric properties of the impairment rating scale in samples of children with attention deficit hyperactivity disorder and two school-based samples. Journal of Clinical Child and Adolescent Psychology, 35(3), 369-385.
Important Link
Scale File:
Frequently Asked Questions
What does the MTIRS measure?
The MTIRS assesses functional impairment in children, focusing on academic, social, and behavioral areas within a classroom context.
Who is the MTIRS intended for?
It is intended for use by teachers to evaluate children who may exhibit impairments associated with ADHD and related behavioral challenges.
How frequently should the MTIRS be administered?
The MTIRS is designed for monthly administration, enabling tracking of progress or changes in classroom behavior over time.
Can MTIRS be used to diagnose ADHD?
The MTIRS is not a diagnostic tool; rather, it measures impairment severity and assists in monitoring treatment effects in diagnosed cases.
Is the MTIRS applicable for non-ADHD students?
While primarily developed for children with ADHD, it may be useful for tracking behavioral and academic performance in students facing various functional challenges.
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