Towards Identifying a Dosage Effect for Improving Fundamental Motor Skills of Preschool Children with a Mastery Motivational Climate Intervention.

Previous mastery motivational climate (MMC) movement interventions have enhanced fundamental motor skill (FMS) competence across diverse groups of preschool-age children. Yet, an adequate intervention length has not been established. Our purposes in this study were to (i) compare FMS competence in preschool children across two doses of MMC interventions, and (ii) describe changes in children's FMS 'mastery' across doses. We used secondary data analysis from a larger MMC intervention study in which 32 children ( = 4.4) received FMS testing (TGMD-3) at the mid-point of intervention and at post-intervention. A two-way mixed ANOVA with Group as the independent variable and FMS competence across three Time points as the repeated measure was significant for both Group and Time main effects for locomotor and ball skill competences separately. There was a statistically significant interaction between Group and Time on locomotor ( = .02) and ball skills ( < .001). Both groups showed significant improvements in their locomotor skills at each time point, but the intervention group improved faster than the comparison group. For ball skills, only the MMC group significantly improved by mid-intervention, and the comparison group showed significant improvements from pre-to post-intervention only. Children in this study were most likely to show mastery in running first, followed by sliding at mid-intervention. Few children mastered skipping, galloping, and hopping across the study. For ball skills, overhand and underhand throwing were more likely to be mastered, and few children mastered one and two-hand striking across the study. Collectively, these findings suggest that duration of instructional minutes may not be the most effective proxy for identifying a dose-response relationship of MMC intervention. Moreover, focusing on the patterns of skill mastery can help inform researchers and practitioners as to how to allocate instructional time during MMC interventions to optimize FMS competence for young children.