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AIMS Calculator
Abnormal Involuntary Movement Scale
A 12-item clinician-rated scale for assessing tardive dyskinesia and other abnormal involuntary movements in patients taking antipsychotic medication.
Score the AIMS
Clinical scoring tool for practitioners. Enter observations to calculate the score.
- 12 items
- ~10 minutes
- Score range: 0–28
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What is the AIMS?
The Abnormal Involuntary Movement Scale (AIMS) is a 12-item clinician-rated assessment for detecting and monitoring tardive dyskinesia and other abnormal involuntary movements. Developed by the US National Institute of Mental Health (NIMH), it is the standard tool for monitoring movement side effects of antipsychotic medication.
The AIMS assesses involuntary movements in seven body regions (facial, oral, extremity, trunk), plus global severity, incapacitation, patient awareness, and dental status.
How AIMS Scoring Works
Items 1-7 assess movements in specific body regions on a 0-4 severity scale (None to Severe). Items 8-10 provide global ratings. Items 11-12 assess dental status.
The primary score is the sum of items 1-7 (movement items), ranging from 0 to 28. Guy (1976, NIMH) published the AIMS without total-score severity cutoffs. The authoritative criterion for probable tardive dyskinesia is the Schooler-Kane criterion (Schooler & Kane, 1982): a score of ≥2 on at least two movement items, OR a score of ≥3 on any single movement item, combined with ≥3 months of antipsychotic exposure.
The AIMS examination follows a standardised observation protocol to ensure consistent assessment.
Use the AIMS inside Grounded Scribe
Registered practitioners can administer the AIMS to clients, track scores across sessions, and auto-document results into clinical notes.
- Send to clientsEmail, SMS, or secure link.
- Track progress over timeOutcome charts and trend overlays.
Clinical Applications
The AIMS is used for baseline assessment before starting antipsychotics, regular monitoring during treatment (typically every 3-6 months on stable doses, more frequently with dose changes), and when patients report abnormal movements.
Early detection of tardive dyskinesia is critical as the condition may be irreversible. The AIMS provides a standardised framework for systematic monitoring.
AIMS in Australian Practice
The AIMS is the standard tool for monitoring tardive dyskinesia in Australian psychiatric services. Australian clinical guidelines for antipsychotic prescribing recommend regular AIMS assessments for all patients on long-term antipsychotic medication.
As a US federal government work (NIMH, 1976), the AIMS is in the public domain.
Frequently Asked Questions About the AIMS
Is the AIMS free to use?
Yes. The AIMS is a US federal government work (NIMH, 1976) and is in the public domain. No permission is required.
How often should the AIMS be administered?
The AIMS should be performed at baseline before starting antipsychotic medication, and every 3-6 months thereafter. More frequent monitoring may be needed with dose changes or if symptoms emerge.
Send this assessment to clients →What AIMS score indicates tardive dyskinesia?
The authoritative threshold is the Schooler-Kane criterion (Schooler & Kane, 1982), applied to the per-item movement ratings (items 1–7), not to the 0–28 total. The criterion is met when any single movement item is rated ≥3 (moderate or severe) OR at least two items are rated ≥2 (mild or above), combined with ≥3 months of cumulative antipsychotic exposure. Clinical judgement should also consider the overall pattern and rule out alternative causes.
Related Clinical Calculators
Other validated instruments commonly used alongside the AIMS.
- CGI
Psychiatric MonitoringA 2-item clinician-rated scale: illness severity (CGI-S) and global improvement (CGI-I). The most widely used brief assessment of the clinician's view of a patient's global functioning. Each item is read against its own anchor labels.Calculate → - BPRS
Psychiatric MonitoringAn 18-item clinician-rated scale for assessing the severity of psychiatric symptoms including psychosis, mood disturbance, and anxiety.Calculate →
References
- Guy W. ECDEU Assessment Manual for Psychopharmacology — Revised. US Dept Health, Education, Welfare publication (ADM) 76-338. Rockville, MD: NIMH, 1976:534-537.
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