Statistical table
| Analysis | Data structure | Statistical test | Power | |
|---|---|---|---|---|
| a | Monotonicity test for spatiotemporal code: entire population | y = spatial code, x = time step | Spearman's ρ correlation | rs = 0.90, p = 2.44 × 10−6 |
| b | V population (1st time step) code vs T code | Normality in V code distribution not assumed, n = 10 | One-sample Wilcoxon signed rank test | p > 0.05 |
| c | VM population (1st time step) code vs T code | Normality in V code distribution not assumed, n = 41 | One-sample Wilcoxon signed rank test | p = 3.2 × 10−5 |
| d | Monotonicity test for spatiotemporal code: VM population | y = spatial code, x = time step | Spearman's ρ correlation | rs = 0.91, p = 9.08 × 10−7 |
| e | VM population (final time step) code vs G code | Normality in V code distribution not assumed, n = 40 | One-sample Wilcoxon signed rank test | p = 3.51 × 10−7 |
| f | Early-delay (time step 4) code vs visual response (time step 1) code | Normality in VM code distribution not assumed, n = 21 | Paired-sample Wilcoxon signed rank test | p = 0.302 |
| g | Late-delay (time step 13) code vs visual response (time step 1) code | Normality in VM code distribution not assumed, n = 21 | Paired-sample Wilcoxon signed rank test | p = 0.0190 |
| h | Figure 7B: early-, mid-, and late-delay (time steps 4, 9, 13) code vs movement response (time step 15) code | Normality in VM code distribution not assumed, n = 21 | Bonferroni corrected; Wilcoxon test | p < 0.05 (see Fig 7B) |
| i | Monotonicity test for spatiotemporal code: VM neurons with sustained delay | y = spatial code, x = time step | Spearman's ρ correlation | rs = 0.86, p = 2.40 × 10−5 |
| j | Monotonicity test for spatiotemporal code (during delay-only period): VM neurons with sustained delay | y = spatial code, x = time step | Spearman's ρ correlation | rs = 0.76, p = 0.0038 |
| k | DM population (final time step) code vs T code | Normality in DM code distribution not assumed | One-sample Wilcoxon signed rank test | p = 4.88 × 10−4 |
| l | DM population (final time step) code vs G code | Normality in DM code distribution not assumed | One-sample Wilcoxon signed rank test | p = 0.0015 |
| m | Monotonicity test for spatiotemporal code: DM population | y = spatial code, x = time step | Spearman's ρ correlation | rs = 0.47, p = 0.20 |
| n | M population (final time steps) code vs G code | Normality in M code distribution not assumed, n ≤ 10 | One-sample Wilcoxon signed rank test | p > 0.20 |
| o | DM population vs VM population code | Normality in neither population distribution is assumed | Mann–Whitney U test | p > 0.25 for each time step |
| p | DM population vs VM population spatiotemporal progression | Two slopes obtained from: y = spatial code, x = time step | Linear regression comparison | p = 0.87 |
| q1 | VM population (motor epoch) vs M population (motor epoch) code | Normality in neither population distribution is assumed | Bonferroni-corrected Mann–Whitney U test | p = 6.16 × 10−5 |
| q2 | DM population (motor epoch) vs M population (motor epoch) code | Normality in neither population distribution is assumed | Bonferroni-corrected Mann–Whitney U test | p = 3.49 × 10−5 |
| r | VM population (15th time step) code vs M neurons (15th time step) but only neurons with preference for G-like codes | Normality in neither population distribution is assumed | Mann–Whitney U test | p = 0.0127 |