Class 'output_Shadow_all': a set of adaptive assembly solutions

output_Shadow_all is an S4 class for representing a set of adaptive assembly solutions.

Details

notations

• ni denotes the number of items in the item_pool object.

• ns denotes the number of stimuli.

• nj denotes the number of participants.

Slots

call

the function call used for obtaining this object.

output

a length-*nj* list of output_Shadow objects, containing the assembly results for each participant.

final_theta_est

a length-*nj* vector containing final theta estimates for each participant.

final_se_est

a length-*nj* vector standard errors of the final theta estimates for each participant.

exposure_rate

a matrix containing item-level exposure rates of all items in the pool. Also contains stimulus-level exposure rates if the assembly was set-based.

usage_matrix

a *nj* by (*ni* + *ns*) matrix representing whether the item/stimulus was administered to each participant. Stimuli representations are appended to the right side of the matrix.

cumulative_usage_matrix

a *nj* by (*ni* + *ns*) matrix representing the number of times the item/stimulus was administered to each participant over multiple administrations.

true_segment_count

a length-*nj* vector containing the how many examinees are now in their segment based on the true theta. This will tend to increase. This can be reproduced with true theta values alone.

est_segment_count

a length-*nj* vector containing the how many examinees are now in their segment based on the estimated theta. This will tend to increase. This can be reproduced with estimated theta values alone.

eligibility_stats

exposure record for diagnostics.

check_eligibility_stats

detailed segment-wise exposure record for diagnostics. available when config_Shadow@exposure_control$diagnostic_stats is TRUE.

no_fading_eligibility_stats

detailed segment-wise exposure record without fading for diagnostics. available when config_Shadow@exposure_control$diagnostic_stats is TRUE.

freq_infeasible

a table representing the number of times the assembly was initially infeasible.

pool

the item_pool used in the assembly.

config

the config_Shadow used in the assembly.

constraints

the constraints used in the assembly.

true_theta

the true_theta argument used in the assembly.

data

the data argument used in the assembly.

prior

the prior argument used in the assembly.

prior_par

the prior_par argument used in the assembly.

adaptivity

a list of adaptivity indices.

simulation_constants

a list containing simulation constants parsed from input.