output_Shadow-class: Class 'output_Shadow': adaptive assembly solution for one...
In TestDesign: Optimal Test Design Approach to Fixed and Adaptive Test Construction

output_Shadow-class

R Documentation

Class 'output_Shadow': adaptive assembly solution for one simulee

Description

output_Shadow is an S4 class to represent the adaptive assembly solution for one simulee.

Slots

simulee_id: the numeric ID of the simulee.
true_theta: the true theta of the simulee, if was specified.
true_theta_segment: the segment number of the true theta.
final_theta_est: final theta estimate.
final_se_est: the standard error of final_theta_est.
administered_item_index: item IDs administered at each position.
administered_item_resp: item responses from the simulee at each position.
administered_item_ncat: the number of categories of each administered item.
administered_stimulus_index: stimulus IDs administered at each position.
shadow_test_refreshed: TRUE indicates the shadow test was refreshed for the position.
shadow_test_feasible: TRUE indicates the MIP was feasible with all constraints.
solve_time: elapsed time in running the solver at each position.
initial_theta_est: initial theta estimate.
interim_theta_est: interim theta estimates at each position.
interim_se_est: the standard error of the interim estimate at each position.
theta_segment_index: segment numbers of interim theta estimates.
prior: prior distribution, if was specified.
prior_par: prior parameters, if were specified.
posterior: the posterior distribution after completing test.
posterior_sample: posterior samples of interim theta before the estimation of final theta. mean(posterior_sample) == interim_theta_est[test_length] holds.
likelihood: the likelihood distribution after completing test.
shadow_test: the list containing the item IDs within the shadow test used in each position.
max_cat_pool: the maximum number of response categories the item pool had.
ni_pool: the total number of items the item pool had.
ns_pool: the total number of stimuli the item pool had.
test_length_constraints: the test length constraint used in assembly.
set_based: whether the item pool was set-based.
item_index_by_stimulus: the list of items by each stimulus the item pool had.