Table 1. Session days, with instructed imageries and decoder parameters.

β are r are in speed units of screen height / second. α and p are unitless. β is specified for sessions where we normalized the tuning matrix such that β was in meaningful units. r and p are specified for sessions where the nonlinear speed adjustment was used (i.e., p ≠ 1.0).

Post-implant day	Session type	Task	Instructed cursor imagery	Instructed click imagery	Cursor decoder parameters
39	First-ever Usage	Radial8 Calibration	Right Hand Mouse, Left Hand Mouse, Right Hand Paintbrush, Left Hand Paintbrush, Tongue Sticking Out, Tongue Inside Mouth	n/a	α = 0. 9
171	Evaluation	Radial8 Calibration	Head Mouse / Intuition	Close Mouth, Close Right Hand	α = 0. 9 β = 0.2, 0.15
		Grid Evaluation	“	“	“
202	Simultaneous Speech and Cursor	Radial8 Calibration	Right Hand Mouse	n/a	α = 0. 9 β = 0.2
		Simultaneous Speech and Cursor			α = 0. 9 β = 0.15
233	Evaluation	Radial8 Calibration	Right Hand Mouse	Close Right Hand	α = 0.93 β = 0.16
		Grid Evaluation			α = 0. 9 β = 0. 2
339	Evaluation	Radial8 Calibration	Right Hand Mouse	Close Right Hand	α = 0.93 β = 0. 22 r = 0. 4 p = 1. 4
		Grid Evaluation	“	“	“
468	Evaluation	Radial8 Calibration	Intuition	Intuition	α = 0. 92 β = 0.13 r = 0. 05 p = 1. 5
		Grid Evaluation	“	“	“