LSTM

BiLSTM

sLSTM

Avg.

MT-DNN

MT-CNN

FS-MTL

SP-MTL

ASP-MTL

Books

20.5

19.0

18.0

19.2

17.8(1.4)

15.5(3.7)

17.5(1.7)

18.8(0.4)

16.0(3.2)

Electronics

19.5

21.5

23.3

21.4

18.3(3.1)

16.8(4.6)

14.3(7.1)

15.3(6.1)

13.2(8.2)

DVD

18.3

19.5

22.0

19.9

15.8(4.1)

16.0(3.9)

16.5(3.4)

16.0(3.9)

14.5(5.4)

Kitchen

22.0

18.8

19.5

20.1

19.3(0.8)

16.8(3.3)

14.0(6.1)

14.8(5.3)

13.8(6.3)

Apparel

16.8

14.0

16.3

15.7

15.0(0.7)

16.3(+0.6)

15.5(0.2)

13.5(2.2)

13.0(2.7)

Camera

14.8

14.0

15.0

14.6

13.8(0.8)

14.0(0.6)

13.5(1.1)

12.0(2.6)

10.8(3.8)

Health

15.5

21.3

16.5

17.8

14.3(3.5)

12.8(5.0)

12.0(5.8)

12.8(5.0)

11.8(6.0)

Music

23.3

22.8

23.0

23.0

15.3(7.7)

16.3(6.7)

18.8(4.2)

17.0(6.0)

17.5(5.5)

Toys

16.8

15.3

16.8

16.3

12.3(4.0)

10.8(5.5)

15.5(0.8)

14.8(1.5)

12.0(4.3)

Video

18.5

16.3

16.3

17.0

15.0(2.0)

18.5(+1.5)

16.3(0.7)

16.8(0.2)

15.5(1.5)

Baby

15.3

16.5

15.8

15.9

12.0(3.9)

12.3(3.6)

12.0(3.9)

13.3(2.6)

11.8(4.1)

Magazines

10.8

8.5

12.3

10.5

10.5(+0.0)

12.3(+1.8)

7.5(3.0)

8.0(2.5)

7.8(2.7)

Software

15.3

14.3

14.5

14.7

14.3(0.4)

13.5(1.2)

13.8(0.9)

13.0(1.7)

12.8(1.9)

Sports

18.3

16.0

17.5

17.3

16.8(0.5)

16.0(1.3)

14.5(2.8)

12.8(4.5)

14.3(3.0)

IMDB

18.3

15.0

18.5

17.3

16.8(0.5)

13.8(3.5)

17.5(+0.2)

15.3(2.0)

14.5(2.8)

MR

27.3

25.3

28.0

26.9

24.5(2.4)

25.5(1.4)

25.3(1.6)

24.0(2.9)

23.3(3.6)

AVG

18.2

17.4

18.3

18.0

15.7(2.2)

15.5(2.5)

15.3(2.7)

14.9(3.1)

13.9(4.1)