Fig. 6

Influence of AD on the UWTN and PWTN change. Top row indicates the AD change of each decoder depending on PWTN change (from 20 to 100%) of neuronal ensemble with fixed UWTN (from 20 to 100%), whereas bottom row indicates vice versa. Solid red line denotes AD of the KF, green is that of the OLE, and the blue is that of the PVA. Top square-dots signify SNR ranges which are a significantly different (based on Watson’s U2 test, p < 0.01) between decoders. The red square-dot denotes significant range between AD of the KF and that of the OLE. The green and purple also denote significant ranges regarding the KF–PVA and the OLE–PVA