Fig. 4

Force regularity. Age (years; log₁₀ scale) associations with force SampEn (unitless; log₁₀ scale) for (A) the autism (ASD; red circles) and (B) neurotypical control (NT; blue triangles) groups. Higher SampEn corresponds to lower regularity. The regression lines represent the significant group x age effects (across conditions), though data for visually guided (Vis; solid points) and memory guided (Mem; empty points) are also shown. (C) Force regularity depicted as a function of group (NT: blue triangles; ASD: red circles) during the visually guided feedback (Vis; solid points) and memory guided (Mem; empty points) conditions. The large points represent group x condition marginal means adjusted for random intercepts of subject in the LMER models. The * represents the significant effect of group in the visually guided condition (group x condition interaction). Error bands (A, B) and bars (C) represent the 95% confidence intervals from the MLM models after accounting for random intercepts of subject