Table 1 Significant effects from experiment 1 (n=14).

Effect	F	df	P	η ²
Grasping asynchrony
Main effect of action-type	11.88	1,13	0.004	0.477
Main effect of movement-type	8.46	1,13	0.012	0.394
Action-type × movement-type	35.81	1,13	<0.001	0.734
Action-type × clip-type × movement-type	89.37	1,13	<0.001	0.873
Site × action-type	*5.37*	*2,26*	*0.011*	*0.292*
Reaction times
Action-type × clip-type	5.49	1,13	0.036	0.297
Site × action-type	*3.5*	*2,26*	*0.045*	*0.212*
Site × movement-type	*3.8*	*2,26*	*0.036*	*0.226*
Movement times
Main effect of clip-type	255	1,13	<0.001	0.951
Action-type × movement-type	2,560	1,13	<0.001	0.995
Action-type × clip-type × movement-type	1,131	1,13	<0.001	0.989
maxH
Main effect of clip-type	97.5	1,13	<0.001	0.882
Main effect of movement-type	139.1	1,13	<0.001	0.914
Action-type × clip-type	10.9	1,13	0.006	0.456
Action-type × movement-type	13.3	1,13	0.003	0.505
Clip-type × movement-type	105.8	1,13	<0.001	0.890
Action-type × clip-type × movement-type	10.9	1,13	0.006	0.456
maxAp
Main effect of clip-type	350.4	1,13	<0.001	0.964
Main effect of movement-type	316	1,13	<0.001	0.960
Action-type × clip-type	16.1	1,13	<0.001	0.553
Clip-type × movement-type	118.4	1,13	<0.001	0.901
Clip-type × action-type × movement-type	19.9	1,13	<0.001	0.605

ANOVA, analysis of variance; maxAp, maximum grip aperture; maxH, maximum wrist height.
The table reports all significant effects showed by the repeated measures ANOVAs on z-scores of grasping asynchrony, reaction times, movement times and wrist and pre-shaping kinematics (maxH and maxAp), having stimulation site (aIPS/vertex/sham) × action-type (complementary/imitative) × clip-type (correction/no-correction) × movement-type (power/precision grip) as within-subject factors (see Methods section). In bold and italics are the significant interactions including the factor stimulation site described in the main text.

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