Table 4: Overall classification accuracy using multistep approach.

ProductOverall positive reviewsOverall negative reviewsAverage accuracy of polarity classification
Correctly classifiedMisclassifiedCorrectly classifiedMisclassified

Tablet 1109137090.8905
Tablet 28211101150.8756
Tablet 3991279170.8599
Tablet 41031499180.8632
E-book Reader 11101666130.8585
E-book Reader 21202150100.8458
E-book Reader 3851295200.8491

Average:0.8632