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Convergent validity between two motor tests: movement-ABC and PDMS-2
Hilde Van Waelvelde1, Wim Peersman, Mattieu Lenoir
1Physiotherapy, Ghent University, Belgium. hilde.vanwaelvelde@arteveldehs.be
Insights
The Movement Assessment Battery for Children (M-ABC) and Peabody Developmental Motor Scales-2 (PDMS-2) correlate well but do not identify motor difficulties similarly. Clinicians should not use these tests interchangeably for diagnosing children.
Area of Science:
- Pediatric motor development
- Clinical assessment tools
- Child psychology
Background:
- Accurate assessment of motor skills is crucial for early intervention in children.
- The Movement Assessment Battery for Children (M-ABC) and Peabody Developmental Motor Scales-2 (PDMS-2) are commonly used tools.
- Understanding the convergent validity of these measures is important for clinical practice.
Purpose of the Study:
- To investigate the convergent validity between the M-ABC and PDMS-2 in young children.
- To compare the ability of both tests to identify children with motor difficulties.
Main Methods:
- Thirty-one 4- and 5-year-old children from a clinical setting participated.
- Children were administered both the M-ABC and PDMS-2 in a counterbalanced order.
- Statistical analyses included correlation coefficients (rs) and kappa statistics (K).
Main Results:
- A strong correlation was found between the total scores of the M-ABC and PDMS-2 (rs = .76).
- Agreement in identifying children with motor difficulties was low (K = .29).
- The PDMS-2 showed lower sensitivity in detecting mild motor impairments compared to the M-ABC.
Conclusions:
- While the M-ABC and PDMS-2 measure similar underlying constructs of motor ability, they are not interchangeable in clinical settings.
- Clinicians must be aware of the differential sensitivity of these tools when assessing motor development and identifying potential impairments.
- The findings highlight the need for careful selection of assessment tools based on specific diagnostic needs.
Abstract:
The aim of this study was to investigate the convergent validity of the Movement Assessment Battery for Children (M-ABC) and the Peabody Developmental Motor Scales - 2 (PDMS-2). Thirty-one 4- and 5-year-old children (mean age 4 years 11 months, SD 6 months), all recruited from a clinical setting, took part in the study. Children were tested on the M-ABC and the PDMS-2 in a counterbalanced order on the same occasion. The results showed that the total scores on the two tests correlated well (rs = .76). However, when the ability of the two tests to identify children with difficulties was examined, agreement between them was low (K = .29), with the PDMS-2 being less sensitive to mild motor impairment in this population. Taken together, these findings suggest that clinicians need to be aware that, although measuring a similar construct, these tests are not interchangeable.
