Fig 2. Means and standard errors for task performance for preterm children with birth weight ≤ 1500 g and > 1500 g, and full-term children in single-, dual-, and triple-task conditions.

Measures were number of named animals (animals), recalled digits (digits), and how many times a button could be unfastened and fastened (button). Performance in the tray concurrent task was excluded from the figure as both groups showed no variance in this task. P values are presented for significant main effects of walking conditions (comparing single task vs. dual- and triple tasks) and for linear trends showing increasing gait performance from preterm children with birth weight ≤ 1500 g to preterm children with birth weight > 1500 g to full-term children. For statistical analyses log-transformed parameters of task performance were used.