Table 6: Median values, 95% CI, and standard error of ROUGE scores over 20 consecutive runs of methods.

MethodsROUGE-1ROUGE-2ROUGE-SU4
Median95% CIStdr.Median95% CIStdr.Median95% CIStdr.

pSum-SaDE0.4422[0.4417, 0.4426]2.2 𝑒 – 40.0992[0.0990, 0.0994]7.8 𝑒 − 50.1596[0.1591, 0.1598]1.7 𝑒 − 4
pSum-DE0.4387[0.4383, 0.4394]2.5 𝑒 – 40.0974[0.0971, 0.0976]1.1 𝑒 − 40.1570[0.1564, 0.1575]2.6 𝑒 − 4
LEX0.4040[0.4022, 0.4057]8.3 𝑒 – 40.0915[0.0910, 0.0919]2.3 𝑒 − 40.1457[0.1448, 0.1465]4.1 𝑒 − 4
TMR + TF0.4059[0.4048, 0.4067]4.4 𝑒 – 40.0921[0.0911, 0.0922]2.7 𝑒 − 40.1515[0.1508, 0.1520]3.0 𝑒 − 4
HybHSum0.4306[0.4299, 0.4310]2.6 𝑒 – 40.0916[0.0908, 0.0916]2.1 𝑒 − 40.1514[0.1508, 0.1518]2.6 𝑒 − 4
PLSA-JS0.4330[0.4327, 0.4341]3.2 𝑒 – 40.0975[0.0970, 0.0981]2.6 𝑒 − 40.1557[0.1549, 0.1565]4.0 𝑒 − 4
iRANK0.4019[0.4014, 0.4046]7.8 𝑒 – 40.0915[0.0912, 0.0920]2.0 𝑒 − 40.1447[0.1446, 0.1458]2.9 𝑒 − 4
HierSum0.4016[0.4006, 0.4023]4.2 𝑒 – 40.0889[0.0877, 0.0894]4.1 𝑒 − 40.1441[0.1427, 0.1442]3.5 𝑒 − 4
SVR0.4024[0.4008, 0.4030]5.1 𝑒 – 40.0922[0.0915, 0.0941]6.1 𝑒 − 40.1491[0.1483, 0.1497]3.4 𝑒 − 4