Detecting individual change in children with mild to moderate motor impairment: the standard error of measurement of the Movement ABC
- 1 October 1999
- journal article
- research article
- Published by SAGE Publications in Clinical Rehabilitation
- Vol. 13 (5), 420-429
- https://doi.org/10.1191/026921599675491988
Abstract
Objective: To assess whether the Movement ABC can be used to monitor individual change in motor performance. Design: Motor-impaired children were tested three times in succession with the Movement ABC without any intervention. Setting: Two schools for special education and one school for children who are chronically ill. Subjects: Three girls and 20 boys aged 6–8 years. Main outcome measures : Scores were measured per item (0→ 5), added to cluster scores (0→ 10 or 15), added to form the total scores (0→ 40). Mean scores, standard errors of measurement (SEMs) and least detectable differences (LDDs) were calculated per item, per cluster and for the total scores. A repeated measures analysis of variance was performed to test for the effects of time. Results: The total scores improved significantly from the first session (mean: 15.4 points) to the second (mean: 13.3), but not from the second to the third (mean: 13.2). Average item scores ranged from 0.6 to 2.7 points with SEMs of 0.79→1.54 and LDDs of 2.20→ 4.27. Average cluster scores ranged from 3.4 to 5.3 with SEMs of 1.51→ 1.84 and LDDs of 4.18→5.11. The SEM of the total scores equalled 3.13 with an LDD of 8.68. Conclusions: The total score of the Movement ABC is sufficiently sensitive to monitor individual change; the cluster scores have moderate sensitivity and individual items are inappropriate to monitor individual change. The significant effect of time is interpreted as an effect of learning.Keywords
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