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Experimental stimuli from experiment 2. A: frame capture from video recording during experiment 2, showing the position of the participant's hand, experimenter's hand, and the target object during a null (no action) trial. B: similar to A, but the experimenter performs a “punch hand” action that is observed by the participant. C: frames illustrating each of the 4 actions used in the experiment, formed by crossing effector (finger, hand) × goal (lift, punch).
