Table 2 Performance on real world datasets: each cell reports MCC, 95% confidence interval (parenthesis) and the value of γ [squared brackets]

MNIST

Digit 1

0.67 (0.075)

0.78 (0.032)

0.78 (0.034) [5.4]

0.80 (0.027) [7.0]

Digit 2

0.38 (0.042)

0.60 (0.064)

0.64 (0.059) [3.3]

0.64 (0.059) [3.0]

Digit 3

0.47 (0.040)

0.61 (0.032)

0.61 (0.028) [6.0]

0.61 (0.028) [7.0]

Digit 4

0.39 (0.022)

0.48 (0.036)

0.53 (0.044) [4.7]

0.53 (0.037) [3.2]

Digit 5

0.44 (0.036)

0.56 (0.046)

0.61 (0.036) [3.3]

0.64 (0.035) [3.2]

Digit 6

0.90 (0.039)

0.94 (0.003)

0.94 (0.002) [6.0]

0.94 (0.002) [7.0]

Digit 7

0.43 (0.027)

0.66 (0.043)

0.71 (0.042) [4.8]

0.75 (0.032) [7.0]

Digit 8

0.47 (0.062)

0.65 (0.057)

0.74 (0.038) [4.8]

0.72 (0.050) [3.2]

Digit 9

0.43 (0.020)

0.52 (0.026)

0.53 (0.023) [4.9]

0.56 (0.026) [4.2]

Gender images

Female

0.51 (0.039)

0.57 (0.028)

0.57 (0.020) [3.0]

0.57 (0.028) [2.0]

Male

0.55 (0.028)

0.61 (0.021)

0.60 (0.022) [3.3]

0.61 (0.021) [2.4]

BBC articles

Business

0.80 (0.020)

0.53 (0.038)

0.72 (0.040) [1.3]

0.81 (0.021) [1.1]

Entmt.

0.84 (0.027)

0.57 (0.040)

0.76 (0.047) [1.5]

0.86 (0.025) [1.3]

Phoneme

Nasal

0.37 (0.030)

0.41 (0.028)

0.43 (0.025) [2.9]

0.43 (0.025) [3.0]

Oral

0.41 (0.025)

0.44 (0.022)

0.46 (0.019) [2.8]

0.46 (0.019) [3.0]