Abnormal Involuntary Movement Scale (AIMS)

12-item scale to assess severity of dyskinesias


The Abnormal Involuntary Movement Scale (AIMS) was developed by the Psychopharmacology Research Branch of the National Institute of Mental Health and is one of the most widely used questionnaires for dyskinesias. The AIMS can be readily administered in a few minutes, by an experienced clinician ideal for patients receiving medications that may cause Tardive Dyskinesias.

Part of the AIMS assessment includes observation of the patient under specific examination procedures, which must be followed. Patients may suppress movements while concentrating intensely. Therefore, administration of the AIMS can be supplemented by requesting that the patient perform additional tasks during the assessment.

In general the AIMS is regularly assessed after administration of medications, the time course of abnormal movements may be regularly recorded and plotted. The total score on the AIMS test is not reported to the patient. A rating of two or higher is evidence of tardive dyskinesia. The AIMS test is considered extremely reliable when it is given by experienced raters.


Gharabawi GM, Bossie CA, Lasser RA, Turkoz I, Rodriguez S, Chouinard G.

Schizophr Res. 2005;77(2-3):119-28.

The Abnormal Involuntary Movement Scale (AIMS) calculator is created by QxMD.

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1. Muscles of facial expression

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e.g., movements of forehead, eyebrows, periorbital area, cheeks. Include frowning, blinking, grimacing of upper face.

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