or not the rating value used in the preferred embodiment of the present invention is given to each user by leveraging the collective intelligence of users who have no relationship with one another for this reason the rating value is resistant to attempts to skew the value by a malicious user groups before selecting jurors the collective intelligence avatar calculates a total rating value a of the user u who is doing the malicious action the total rating value a is the sum of the rating value of the avatar user itself the rating value of an object possessed by the avatar and the rating value of a group to which the avatar belongs the greater the total rating value is the higher reliability the user has a 2 u the sum of the rating values of elements in a set of objects possessed by the user u a 3 u the sum of the rating values of elements in a set of groups to which the user u belongs the total rating value a may not be a simple linear sum but each of these values may be weighted to obtain the total rating value a in the same manner a total rating value a t of the informer is calculated when a t u2212 a u gt m m is a predetermined constant is satisfied the.