Fig. 3

Over-ground transfer on Day 1 and Day 2. a Transfer to over-ground walking on Day 1. Here, reductions in foot clearance indicate improvements in skill. b Over-ground retention on Day 2. Horizontal lines within each box indicate median values and the bottom and top boundaries of each box indicate the 25th and 75th percentiles. Dark gray points represent individual data points and the gray lines connecting the points represent the change in foot clearance across trials. c Trials during over-ground obstacle negotiation. Black points represent average foot clearance across all participants and gray vertical lines represent standard deviation. BASE: baseline block for over-ground on Day 1, TF: transfer block for over-ground on Day 1, and RET_OG: retention block for over-ground on Day 2. The asterisks (***) indicate statistically significant differences from zero at p < 0.001