Figure 5.

Two sets of objects were used in Experiment 4. The small, central object was either self-mobile (controlled by a magnet beneath the top surface) or moved by a human hand, depending on group assignment. For the human intervention group, the adult’s hand moved the object laterally so that it made contact with one of the blocks. This caused the effect (the egg or box lit up). For the natural covariation group, the object moved autonomously to make contact with one of the blocks, which caused the effect. The spatiotemporal trajectory that followed, the timing of the events, and the effect were identical in both groups.