Table 5.

Summary of EEG-based BCI speller studies.

References	No. of subjects	Control signal	Method	Classification algorithm	Typing speed	Success RATE
Obeidat et al. (2015)	14	P300	Stimuli variation	Bayesian BLDA	13.7 bits/min	93.3%
Cao et al. (2017)	3	MI	Oct-O-spell	SVM	67.33 bits/min	98.23%
Ansari and Singla (2016)	20	SSVEP	Multi-phase spellers	SVM	13 chars/min	96.04%
Chang et al. (2016)	10	SSVEP+P300	Hybrid speller	CCA, SWLDA	31.8 bits/min	93%
Käthner et al. (2015)	19	P300	Familiar faces and symbols	SWLDA	15.85 bits/min	95%