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Abstract
To evaluate the construct validity and model-based reliability of general and specific contributions of the subscales of the Movement Assessment Battery for Children-2 (MABC-2) and Bruininks-Oseretsky Test of Motor Proficiency-2 (BOT-2) when evaluating motor skills across a range of psychiatric disorders. Confirmatory factor analysis (CFA) and bifactor analysis were conducted on BOT-2 data from 187 elementary school students (grades 1 to 6) (mean age: 113 ± 20 months; boys: n = 117, 62.56%) and on MABC-2 data from 127 elementary school students (grade 1) (mean age: 76 ± 2 months; boys: n = 58, 45.67%). The results of the CFA fit the data for multidimensionality for the BOT-2 and presented poor fit indices for the MABC-2. For both tests, the bifactor model showed that the reliability of the subscales was poor. The BOT-2 exhibited factorial validity with a multidimensional structure among the current samples, but the MABC-2 showed poor fit indices, insufficient to confirm its multidimensional structure. For both tests, most of the reliable variance came from a general motor factor (M-factor), therefore the scoring and reporting of subscale scores were not justified for both tests.
Highlights
Motor skills serve as the basis for sports and recreation, but are embedded in all activities of daily living
Considering the bifactor model for BOT2, the model presented reasonable fit indices: χ2(17) = 38.545, p = 0.0021; comparative fit index (CFI) = 0.962; Tucker-Lewis index (TLI) = 0.938; root mean square error of approximation (RMSEA) = 0.082 (90%CI = 0.048 to 0.117)
Using the Confirmatory factor analysis (CFA) for both Bruininks-Oseretsky Test of Motor Proficiency-2 (BOT-2) and Movement Assessment Battery for Children-2 (MABC-2), factorial validity with multidimensional structures was found for the studied population
Summary
Motor skills serve as the basis for sports and recreation, but are embedded in all activities of daily living. While there is no gold standard to measure children’s motor abilities, the Movement Assessment Battery for Children, Second Edition (MABC-2)[4] and the Bruininks-Oseretsky Test of Motor Proficiency (BOT2)[5] are the tools most commonly used in both clinical and research settings. The former assesses three dimensions: manual dexterity, aiming and catching, and balance. The BOT-2 assesses four dimensions: fine manual control, manual coordination, body coordination, and strength and agility Construct validity has not been assessed by external researchers, factorial validity is provided in the assessment manual,[5] with good fit statistics that provide validity evidence for the four motor-areas (Table 6.10 in the manual)
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