The generative process is described as follows: , and set the item latent vector as -draw the response , univariate Gauss distribution, where c ij is a confidence parameter for rating r ij , a > b. c ij = a (higher confidence), if r ij = 1, and c ij = b, if r ij = 0.
cTR does not take the complex social network information, which is available and crucial in many real-world applications, into consideration.