FIGURE 6.

Bootstrap Stability Indices I_q and independent component analysis (ICA) Model Order K. (A) Unweighted bootstrap stability index I_q, plotted as sample quantiles in increments of 10 (e.g., bottom lightest shade encompasses minimum to top 10th quantile of I_q at given model order), with the solid blue line showing median I_q. Upper quantiles remained highly stable even at high K, while lower quantiles gradually decreased. Dashed line: quantiles at K = 20 (i.e., ICA₂₀). (B) Weighted average bootstrap stability index $\overline{I_q}$ plotted as sample quantiles and median. Compared to unweighted I_q, weighted average $\overline{I_q}$ demonstrated fewer outliers in the lowest quantiles resulting from network subdividing. Dashed line: quantiles at ICA₂₀.