Tool

Task

Concepts and Terminologies Used

ConAsp(i)

To determine the most controversial aspect a of an item i

Popularity and Controversy, AST

ConItem(a)

To find the most controversial item i based on an aspect a

Popularity and Controversy, AST

MPU(A|i)

To find the users who are most positive about all aspects in A of an item i

IBUD, AST

NN(u’|a)

To determine the users who feel most like specified user u’ based on an aspect a

ABUD, ABUA, AST

MDU(a|I)

To determine pairs of users disagreeing most on a specific aspect a considering all the items in i

ABUD, AST

ASBUC(U_i)

To find the groups of users mostly agreeing on all aspects of an item i

ABUD, ABUA, AST

AEBUC(U_i)

To find the groups of users who emphasize the same aspects of an item i

ABUD, ABUA, AST

EBRA(A|u)

To rank all aspects in A based on the emphasis given by a user u to them

Emphasis Score, AST