Interrater reliability assessment using the Test of Gross Motor Development-2
Lisa M Barnett1, Christine Minto1, Natalie Lander1
1School of Health and Social Development, Faculty of Health, Deakin University, Australia.
Journal of Science and Medicine in Sport
|November 12, 2013
Summary
This study found excellent interrater reliability for the object control subtest of the Test of Gross Motor Development-2. However, some individual skill components require refinement for more consistent assessment.
Area of Science:
- Child development
- Motor skill assessment
- Psychometrics
Background:
- The Test of Gross Motor Development-2 (TGMD-2) is a widely used tool for assessing motor skills in children.
- The object control subtest evaluates skills like throwing, catching, and kicking.
- Ensuring reliable assessment is crucial for accurate diagnosis and intervention planning.
Purpose of the Study:
- To evaluate the interrater reliability of the object control subtest of the TGMD-2.
- To assess the agreement between two raters observing children's object control skills in a naturalistic school setting.
Main Methods:
- A cross-sectional reliability study design was employed.
- Two raters assessed 37 children (aged 4-8 years) on six object control skills.
- Intraclass correlation (ICC) and kappa statistics were used to measure agreement.
Main Results:
- Excellent interrater reliability was found for the overall object control subtest (ICC = 0.93).
- Individual skill reliability ranged from ICC = 0.71 (catch) to ICC = 0.94 (dribble).
- The strike and overhand throw skills showed lower agreement in their components.
Conclusions:
- The TGMD-2 object control subtest demonstrates good overall reliability.
- Specific skill components, particularly for striking and throwing, may need clearer definitions to enhance assessment consistency.
- Refining assessment criteria for certain components could improve the reliability of the object control subtest.
