. Author manuscript; available in PMC: 2024 May 20.

Published in final edited form as: Res Child Adolesc Psychopathol. 2022 Mar 5;50(9):1139–1149. doi: 10.1007/s10802-022-00912-6

Table 3.

Classroom work completion among children with ADHD, n = 59

	MW Condition M [95% CI]			Within-subject effect size compared to Control condition

	Control	Free Play	Movie	Free Play	Movie

Placebo	75.95 [66.00, 85.89]	72.74 [63.21, 82.26]^a	76.16 [66.19, 86.13]	1.61***	0.10
MPH	100.26 [87.16, 113.36]^b	97.51 [84.78, 110.25]^a,b	97.74 [84.97, 110.51]^a,b	1.25**	1.02**
Within-subject effect sizes
MPH vs. Placebo	5.08***	5.59***	5.31***

CI = confident interval, MW = mind-wandering, MPH = methylphenidate. Within-subjects effect sizes were calculated accounting for the correlation between scores (Morris & DeShon, 2002), $d = \frac{|m_{1} - m_{2}|}{\sqrt{S_{1}^{2} + S_{2}^{2} - (2 r s_{1} s_{2})}}$ . At p < .05

significant effect of MW condition (Free Play or Movie) compared to Control condition

significant effect of MPH compared to placebo