int_dim

The integer variable int_dim is the default number of parameters used to define item intercepts. If guessing is .TRUE., then int_dim is 2. If guessing is .FALSE., then the default value of int_dim is one less than num_cat. In addition, if guessing is .FALSE., then int_dim is set to 0 for a read value of int_dim is negative, and int_dim is set to one less than num_cat if int_dim is at least num_cat. In writing.txt, int_dim is 2, for a quadratic model is employed for the logarithm of the conditional probability given the latent variable that an item response has a specified value.