Infant vs.

Uninformed Adult

Uninformed Adult vs.

Informed Adult

t-value

(df = 14)

p-value

Cohen’s d

t-value

(df = 14)

p-value

Cohen’s d

Demonstration duration (s)

4.73

*

0.69

0.55

n.s.

0.03

Reach-to-grasp phase

Phase duration (s)

0.48

n.s.

0.16

0.92

n.s.

0.16

Mean wrist velocity (mm/s)

−1.49

n.s.

0.26

1.48

n.s.

0.23

Wrist trajectory (mm)

−0.43

n.s.

0.09

1.65

n.s.

0.32

Peak height of wrist (mm)

−0.31

n.s.

0.07

1.57

n.s.

0.33

Peak grip aperture (mm)

2.39

*

0.39

−2.31

n.s.

0.23

Lift-to-place phase

Phase duration (s)

3.82

*

0.60

0.37

n.s.

0.04

Mean wrist velocity (mm/s)

−3.74

*

0.36

0.06

n.s.

0.01

Wrist trajectory (mm)

2.43

*

0.46

1.04

n.s.

0.09

Peak height of wrist (mm)

4.17

*

0.50

2.46

n.s.

0.31