Motor assessment of preschool aged children: A preliminary investigation of the validity of the Bruininks–Oseretsky test of motor proficiency – Short form

The aim of this study was to examine the validity of the Bruininks–Oseretsky test of motor proficiency – short form (BOTMP-SF) [Bruininks, R. (1978). Bruininks–Oseretsky test of motor proficiency: Examiners manual. Circle Pines, MN] for the assessment of preschool aged children. Three-hundred and eighteen children 48–71 months old (M = 58.97 months, SD = 6.73) participated in the study. For the data analysis both an ANOVA and a MANOVA were applied with the total battery score and the 14 item scores being the dependent variables, respectively. Age was found to have a significant effect on both children’s total battery score (F(3, 314) = 110.65, p < .001, η2 = .68) and 13 item scores (minimum F(3, 314) = 8.75, p < .001, minimum η2 = .145). Although the aforementioned results represent an evidence for the validity of the BOTMP-SF, a closer study on the score of each item revealed a high percentage of zero scores on four items. Task difficulty has caused a floor effect, constituting a threat to the validity of the preschoolers’ motor assessment with the above battery. A modification of the battery items is suggested, so that the BOTMP-SF will give valid results for children 4–6 years old.