Description Usage Arguments Value
Get the index of the next item to adminster, taking starting (burn in) conditions into account.
1 2 3 4 5 | get_next_item(start_items, information_summary, lp_constraints, lp_characters,
estimate, model, answers, prior_form, prior_parameters, available,
administered, number_items, number_dimensions, estimator, alpha, beta,
guessing, number_itemsteps_per_item, stop_test,
eap_estimation_procedure = "riemannsum")
|
start_items |
List indicating the items that should be shown to the respondent before the theta estimate will be updated
for the first time. One of
|
information_summary |
How to summarize Fisher information, used for item selection. One of
|
lp_constraints |
Data frame with constraints in |
lp_characters |
Data frame with constraint characteristics in |
estimate |
Vector containing current theta estimate, with covariance matrix as an attribute. |
model |
One of |
answers |
Vector with answers to administered items. |
prior_form |
String indicating the form of the prior; one of |
prior_parameters |
List containing mu and Sigma of the normal prior: |
available |
vector with indices of yet available items. |
administered |
Vector with indices of administered items. |
number_items |
Number of items in test bank. |
number_dimensions |
Number of dimensions in theta. |
estimator |
Type of estimator to be used, one of |
alpha |
Matrix of alpha parameters, one column per dimension, one row per item. Row names should contain the item keys. Note that so called within-dimensional models still use an alpha matrix, they simply have only one non-zero loading per item. |
beta |
Matrix of beta parameters, one column per item step, one row per item. Row names should contain the item keys.
Note that |
guessing |
Matrix with one column of guessing parameters per item. Row names should contain the item keys. Optionally used in 3PLM model, ignored for all others. |
number_itemsteps_per_item |
Vector containing the number of non missing cells per row of the beta matrix |
stop_test |
List indicating rules for when to terminate the test. Should be a list of the form
|
eap_estimation_procedure |
String indicating the estimation procedure if estimator is expected aposteriori and prior form is normal. One of |
integer item index next item
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.