create_level_1 {cat.dt} R Documentation

## Level 1 CAT decision tree generator

### Description

Generates a list of nodes lists for the first level of the CAT decision tree

### Usage

create_level_1(bank, crit, dens_vec, C, nres, prob_array)


### Arguments

 bank matrix of the item bank. Rows represent items, and columns represent parameters. If the model is "GRM", the first column represents the alpha parameters and the next columns represent the beta parameters. If the model is "NRM", odd columns represent the alpha parameters and even columns represent beta parameters crit item selection criterion. Options: "MEPV" for Minimum Expected Posterior Variance and "MFI" for Maximum Fisher Information dens_vec vector of the a priori density function values of the evaluated ability levels C vector of item capacities nres vector of number of possible responses for every item prob_array 3-D array of probability responses. Dim 1 represent items, dim 2 represent evaluated ability levels and dim 3 represent possible responses

### Value

A list of lists. Each of these lists represent a node of the first level of the decision tree