Table 2. Threshold values and average MI_2e value of the dataset from Speier et al. when optimizing on different evaluation metrics.

Metric	Threshold	p-value	Bit rate	p-value
MI2e	0.49		17.05
MI2	0.82	0.005	16.24	0.021
MI0	0.86	0.006	16.05	0.020
ACC	0.98	0.001	13.14	0.007
SR	0.12	0.003	15.25	0.008
ITR	0.86	0.006	16.05	0.020
WSR	0.93	0.001	15.31	0.005
PBR	0.87	0.005	15.97	0.015
CPM	0.87	0.005	15.97	0.015
OCM	*	*	*	*

OCM was not computable because the system did not require all errors to be corrected. p-values are determined using paired t-tests between the given value and the results when optimizing on MI_2e. Asterisks denote methods that cannot be computed for the target system.

^*method cannot be computed for the target system