Figure 4. Goodness-of-fit comparison analysis.
Scatter plots compare the pseudo-R2 (pR2) of the whole-arm model to that of the hand-only model for each monkey. Each point in the scatter plot represents the pR2 values of one neuron, with whole-arm pR2 on the vertical axis and hand-only pR2 on the horizontal. Different colors represent neurons recorded during different sessions. Filled circles represent neurons for which one model’s pR2 was significantly higher than that of the other model. In this comparison, all filled circles lie above the dashed unity line, indicating that the whole-arm model performed better than the hand-only model for every neuron in which there was a significant difference.