| Infant | Uninformed Adult | Informed Adult | |||||||
t-value (df = 14) | p-value | Cohen’s d | t-value (df = 14) | p-value | Cohen’s d | t-value (df = 14) | p-value | Cohen’s d | ||
Reach-to-grasp phase |
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| Observer vs. Ball | −3.07 | * | 1.58 | −6.67 | * | 3.38 | −7.16 | * | 3.65 |
| Observer vs. Rocket | 13.53 | * | 5.14 | 7.84 | * | 3.30 | 5.64 | * | 2.33 |
| Ball vs. Rocket | 20.89 | * | 7.42 | 23.78 | * | 8.05 | 19.68 | * |
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Lift-to-place phase |
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| Observer vs. Ball | 7.03 | * | 3.34 | 3.15 | * | 1.26 | 2.06 | n.s. | 0.90 |
| Observer vs. Rocket | 1.56 | n.s. | 0.78 | −1.42 | n.s. | 0.71 | −3.82 | * | 1.83 |
| Ball vs. Rocket | −14.95 | * | 3.26 | −6.73 | * | 2.56 | −8.71 | * | 3.39 |