Computational and Mathematical Methods in Medicine

Research Article

Scenario Screen: A Dynamic and Context Dependent P300 Stimulator Screen Aimed at Wheelchair Navigation Control

Table 1

Comparison among several works where P300 speller variants were used to generate commands for a wheelchair navigation control system. t–nt diff: target–nontarget difference. due to the asymmetric markers arrangement.


	Stimulation	Background	Markers	P300 analysis
	Color scheme	Type	Number	# subjects
	Mode	Color depth	Encoding	Latency
	Presentation		Arrangement	- diff.

Scenario screen (this work)	Blue/green	Real image	12	18
	Single marker	24-bit	Unicode	Yes
	Destination-based and fixed displacements		Asymmetrical	Yes

Escolano [30, 31]	White-green/blue	Real image	12	2
	Row/column	Gray scale and 24-bit	Icon-images	No, yes
	Fixed displacements		Symmetrical	No

Iturrate [32]	Black/blue/white	Virtual image	20	5
	Row/column	8-bit	Icon-images	No
	Fixed displacements		Symmetrical	No

Gentiletti [33]	Gray/white	Solid black	12	2
	Row/column	5-bit	Images + text	No
	Fixed displacements		Symmetrical	No

Lopes [34]	Gray/green	Solid black;	7	11
	Single marker	5-bit	Arrows + text	No
	Fixed displacements		Symmetrical	No

Rebsamen [35, 36]	Blue/white	Solid gray	7	5
	Single marker	5-bit	Box + text	No
	Destination-based		Symmetrical	Yes

Ganin [28, 29]	Image/white	Solid gray	9	14
	Single marker	24-bit	Image + text	Yes
	Fixed displacements		Asymmetrical	Yes