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Published on: June 12, 2019
Test-retest reliability of the Test of Gross Motor Development-3 instrument for children with Down syndrome
Seyide Abiodun-Salawu1, Pieter H Boer2
1Department of Physical Activity, Sport and Recreation, Faculty of Health Sciences, North-West University, Potchefstroom, South Africa.
Background:
The Test of Gross Motor Development-3 (TGMD-3 2019) evaluates fundamental gross motor skills across two domains: locomotor and ball skills.
Objectives:
The purpose of this study was to determine the test-retest reliability of the TGMD-3 in children with Down syndrome.
Method:
Twenty-four children with Down syndrome, aged 9-15 years, from five special needs schools in the North West province of South Africa participated in this study.
Results:
Excellent and good intraclass correlation coefficient values were reported for locomotor (0.91), ball (0.84) and overall gross motor performance (0.91). Standard error of measurement, minimal detectable change at the 95% and Bland-Altman plots showed acceptable precision levels, low variability, a small discrepancy between scores for the two assessments and no systematic bias in the analyses. The test and retest values for locomotor (p = 0.587), ball (p = 0.403) and overall gross motor scores (p = 0.321) were not significant.
Conclusion:
The TGMD-3 instrument showed good to excellent test-retest reliability for assessing gross motor skills in children with Down syndrome.
Contribution:
This study provides an initial reliability analysis of the TGMD-3 instrument amongst selected children with Down syndrome in five districts of the North West province of South Africa.
