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. 2021 Mar 20;21(6):2173. doi: 10.3390/s21062173

Table 4.

Summary of all the Metrics.

	Metrics	Two Class	Multi Class (N-Class)
BCI decoding capabilty	Accuracy	$\frac{D_{11} + D_{22}}{N_{a l l}}$	$\frac{\sum_{i = 1}^{N} D_{i i}}{N_{a l l}}$ , where $N_{a l l} = \sum_{i, j = 1}^{N} D_{i j}$
	Kappa	$\frac{A c c u r a c y - e x p e c t e d a c c u r a c y}{1 - e x p e c t e d a c c u r a c y}$ , $e x p e c t e d a c c u r a c y (A_{e}) = \frac{\sum_{i = 1} N}{D_{i :} D_{: i}}$
	sensitivity	$\frac{D_{22}}{D_{21} + D_{22}}$	$\frac{D_{k k}}{N_{k}}$ , where $N_{k} = \sum_{i = 1}^{N} D_{k, i}$
	ITR $_{W o l p a w}$	${ITR}_{W o l p a w} = {log}_{2} N + A c c . {log}_{2} (A c c) + (1 - A c c) {log}_{2} (\frac{1 - A c c}{N - 1})$
User encoding capability	Stability	$\frac{1}{1 + σ_{C^{A}}}$
User encoding capability	Distinct	$\frac{\sum_{1}^{N} δ_{r} (\bar{C^{A_{i}}}, \bar{\bar{C^{A}}})}{\sum_{1}^{N} σ_{C^{A_{i}}}}$