Table 1B.

Protocol summary – tests for the assessment of “Unpredictability”.

Description	Test	Arm position	Number of trials
Tests for the assessment of “unpredictability” introduced by the electrode interface condition. All tests are repeated for each interface condition (“Ideal,” “Normal,” and “Additional Load”)	Simple reaction time (SRT) – open signal	45° above horizontal	10 × assessed using “ideal” interface, 5 × assessed using “normal” and “additional load”
	Simple reaction time (SRT) – close signal	45° above horizontal	10 × assessed using “ideal” interface, 5 × assessed using “normal” and “additional load”
	Simple reaction time (SRT) – open signal	45° below horizontal	10 × assessed using “ideal” interface, 5 × assessed using “normal” and “additional load”
	Simple reaction time (SRT) – close signal	45° below horizontal	10 × assessed using “ideal” interface, 5 × assessed using “normal” and “additional load”
	Transition – hand open	from 45° above horizontal to 45° below	6 × assessed using “ideal” interface, 3 × assessed using “normal” and “additional load”
	Transition – hand closed	from 45° above horizontal to 45° below	6 × assessed using “ideal” interface, 3 × assessed using “normal” and “additional load”
	Transition – hand open	from 45° below horizontal to 45° above	6 × assessed using “ideal” interface, 3 × assessed using “normal” and “additional load”
	Transition – hand closed	from 45° below horizontal to 45° above	6 × assessed using “ideal” interface, 3 × assessed using “normal” and “additional load”