FIGURE 4.

Speed and cadence. (a) Timelines depicting a trot (top) and a gallop (bottom) of similar speeds. (b) Average crawling speed (cm/second). Left side: scatterplot showing average speed across months of crawling experience in the infants. Each symbol depicts mean data from one session. Right side: box plots showing average crawling speed for each group crawling on hands and knees or hands and feet. Solid lines denote medians, dashed lines denote means, and circles denote outliers beyond 1.5 times the interquartile range. (c) Average crawling cadence (steps/second). Left side: scatterplot showing average cadence across months of crawling experience in the infants. Each symbol depicts data from one session. Right side: box plots showing average cadence for each group crawling on hands and knees or hands and feet. Solid lines denote medians, dashed lines denote means, and circles denote outliers beyond 1.5 times the interquartile range