Table 4.

Estimated between-group differences (GMM vs. FMM) with cognitive and motor covariates.

	Estimated between-group difference	Percent contribution
Without covariate	1.87 ± 0.7
Phonological short-term memory (No. words)	1.81 ± 0.7	3.2
Visuo-spatial short-term memory (No. boxes)	1.22 ± 0.8	34.8
Executive functions (Interference effect, accuracy %)	1.94 ± 1.0	−3.7
Executive functions (Interference effect, RT in ms)	1.99 ± 1.0	−6.4
Fine motor skills (No. of parts)	1.67 ± 0.9	10.7
Gross motor skills (Best time, in sec)	1.41 ± 0.8	24.6

Data reported as means ± SEM. Different covariates added to the statistical model explaining intervention effects in mathematical performance. Percent contribution displays percent accounted for by a single covariate. The intervention effects are primarily accounted for by visuo-spatial short-term memory and gross motor skills.