FIGURE 1.

Birds-eye schematic of our walking task. Starting with their left foot, participants had to walk along the path, step into the blue target box, and over either no obstacles, one (nearest) obstacle or two obstacles. The distance between the start line, target box, and obstacles was personalized to each child’s preferred walking speed, such that their fourth step would naturally place their right foot into the target box, and their sixth and eighth steps would place their right foot over the first and second obstacles, respectively.