Table S2.

Percent of variance accounted for (pvaf) for the five strongest clusters contributing to the surface measured P3 component, separately for targets and non-target stimuli while standing, slow walking, and fast walking.

		P3
Target	Standing	Cluster	Cls 3	Cls 9	Cls 10	Cls 11	Cls 19	Sum
		pvaf %	1.9	4.1	11.0	3.1	31.9	58.0
Target	Slow walking	Cluster	Cls 3	Cls 9	Cls 10	Cls 11	Cls 19	Sum
		pvaf %	2.8	3.2	9.7	2.5	33.5	51.7
Target	Fast walking	Cluster	Cls 9	Cls 10	Cls 11	Cls 18	Cls 19	Sum
		pvaf %	3.4	7.4	4.0	2.6	32.9	50.3
Non-target	Standing	Cluster	Cls 9	Cls 10	Cls 11	Cls 14	Cls 19	Sum
		pvaf %	6.2	11.6	6.5	1.9	23.7	49.9
Non-target	Slow walking	Cluster	Cls 8	Cls 9	Cls 10	Cls 11	Cls 19	Sum
		pvaf %	4.7	3.2	17.2	6.3	24.8	56.2
Non-target	Fast walking	Cluster	Cls 8	Cls 9	Cls 10	Cls 11	Cls 19	Sum
		pvaf %	4.0	6.0	11.6	4.9	29.8	56.3