4. The information processing apparatus of claim 1 , wherein said evaluation prediction section comprises: an estimation section configured to estimate a parameter for use in the evaluation prediction of said content by said first user of interest, based on said evaluation information of said first type by said first user of interest and on said evaluation information by said second user in said evaluation information of said second type by said first user of interest; and a prediction section configured to predict the evaluation by said first user of interest regarding said content based on said parameter of said first user of interest.
4. The information processing apparatus of claim 1 , wherein said evaluation prediction section comprises: an estimation section configured to estimate a parameter for use in the evaluation prediction of said content by said first user of interest, based on said evaluation information of said first type by said first user of interest and on said evaluation information by said second user in said evaluation information of said second type by said first user of interest; and a prediction section configured to predict the evaluation by said first user of interest regarding said content based on said parameter of said first user of interest. 7. The information processing apparatus of claim 4 , wherein said prediction section predicts the evaluation by said first user of interest regarding said content by use of said parameter of said second user evaluated positively by said first user of interest.