Modified McMaster-Ottawa 4-item Scale

Desiree Lie's picture
Submitted by Desiree Lie on May 8, 2017 - 3:49pm CDT

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This 4-item, 3-point scale is modified from the original 7-item scale and is adapted for ease of applicability to clinical settings. It is intended for the assesment of individuals within an interprofessional team in a patient encounter, to provide performance feedback. The scale was validated in the standardized setting of a Team Objective Structured Clinical Encounter (Generalizability coefficient .73). It can be applied to any health profession. The behaviors/skills observed are Collaboration, Roles, Patient/Family-Centeredness and Conflict Management. Descriptive behavioral anchors for each skill permit objective rating and specific feedback. Rater training is recommended.


Lie DA, Richter-Lagha R, Forest CP, Walsh A, Lohenry K. When less is more: validating a brief scale to rate interprofessional team competencies. Med Educ Online. 2017;22(1):1314751, available at

Lie, DA, May, W, Richter, R, Forest, C, Banzali, Y and Lohenry, K. Adapting the McMaster-Ottawa Scale for Assessing Individual and Team performance in a Team Objective Structured Clinical Examination (TOSCE), Medical Educ Online 2015, 20: 26691 available at

Forest CP, Lie, DA, Ma SB. Evaluating interprofessional team performance: a faculty rater tool. MedEdPORTAL Publications. 2016;12:10447.

Lie, Desiree A.
Richter-Lagha, Regina
Forest, Christopher P
Walsh, Anne
Lohenry, Kevin
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