Alberta Infant Motor Scale (AIMS)

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Infants with delayed motor development that are immature but not atypical. Without a known medical diagnosis. Useful for assessment and measuring outcomes

Assesment Type


Patient Group


Age Group

Infants (0-2 years)

ICF domain

Activity & Participation | Body Structure & Function

Area of assessment

Balance and co-ordination | Gross Motor

Key description

Observation in 4 positions-supine, prone, sitting, standing.
with no facilitation of movement
Environment and play used to encourage functional movements
Score totalled for corrected age and plotted on norm-referenced grap


Download PDF of assessment sheets with subscription to some e-book sites. Manual around £45-50 Paper

Equipment required

Scoring sheet & manual Suitable floor, bench or appropriate furniture for standing items Selection of toys appropriate to age to facilitate play and exploration.

Training required

Previous training and experience needed.

Considerations & references

Reliability / validity:

Inter-rater reliability R = 0.9556+; Intra-rater reliability R = 0.8245+
Concurrent validity established by comparison w. BSID & PDMS
Structural validity established through studies of scale with ability to discriminate normal and abnormal

Strengths / weaknesses:
Easy to use, and see the child trajectory of development on graph
Very quick to complete, minimal equipment needed; observational
Highlights areas of “weakness” – effective for care planning and education of parents
Can be repeated monthly to demonstrate progress & effectiveness of input.
Less reliable in infants of very young age (>4 months) and infants approaching independent ambulation (after 12 months)
Not designed for use in infants developing atypically and should be used cautiously with this group.

Time to complete

20-30 minutes on initial assessment. Repeat tests may be quicker.

Also available in Dutch, French, Greek,Spanish, Thai


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