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. Author manuscript; available in PMC: 2022 Apr 11.
Published in final edited form as: J Int Neuropsychol Soc. 2021 May 17;28(4):371–381. doi: 10.1017/S1355617721000576

Table 3.

Motor performance measures by diagnostic group – adjusted for age

TD ADHD


Mean SD Mean SD F-value p-value Partial Eta Squared



Total Overflow (degrees) Collapsed across sex 543.621 465.944 876.527 758.312 11.7 .001 .044
Boys 555.327 473.643 884.748 785.731 9.2 .003 .035
Girls 523.348 457.391 857.710 699.603 3.8 .052 .015
Mean Tap Time (seconds) Collapsed across sex 1.616 0.354 1.719 0.392 3.5 .064 .014
Boys 1.583 0.361 1.689 0.381 4.9 .028 .019
Girls 1.672 0.340 1.788 0.413 0.4 .538 .002
Standard Deviation Tap Time (seconds) Collapsed across sex 0.199 0.094 0.240 0.102 6.3 .013 .024
Boys 0.183 0.086 0.239 0.102 17.1 <.001 .063
Girls 0.226 0.103 0.241 0.103 <.01 .942 <.001

Mean and standard deviation of total overflow, mean tap time, and SD of tap time. Statistics examining for effect of diagnostic groups were calculated using a MANCOVA controlling for age.