Figure 3.

(a) The number of action units plotted against the percent of the action unit that was τ_G ‐coupled for premie (shaded bars) and full‐term (white bars). The higher the percentage, the more of the action unit conformed to the τ_G ‐guidance model, with r ² > 0.95. Those action units where more than 90% of the movement was τ_G ‐coupled were considered to support the model. Note the reduced proportion of premie movements in this category. (b) Box plot of the percent of the action unit that was τ_G ‐coupled for each hand and each direction of movement (“up” means a postero‐anterior movement towards the head and “down” means an antero‐posterior movement towards the waist) for premie (shaded boxes) and full‐term (white boxes)