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irt  

Item Response Theory and Computerized Adaptive Testing Functions
View on CRAN: Click here


Download and install irt package within the R console
Install from CRAN:
install.packages("irt")

Install from Github:
library("remotes")
install_github("cran/irt")

Install by package version:
library("remotes")
install_version("irt", "0.2.9")



Attach the package and use:
library("irt")
Maintained by
Emre Gonulates
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2020-09-24
Latest Update: 2024-02-20
Description:
A collection of Item Response Theory (IRT) and Computerized Adaptive Testing (CAT) functions that are used in psychometrics.
How to cite:
Emre Gonulates (2020). irt: Item Response Theory and Computerized Adaptive Testing Functions. R package version 0.2.9, https://cran.r-project.org/web/packages/irt. Accessed 15 Jul. 2026.
Previous versions and publish date:
(2026-07-09 07:50), 0.1.1 (2020-09-24 08:40), 0.1.3 (2020-11-18 09:50), 0.2.5 (2021-11-09 06:40), 0.2.7 (2022-11-09 22:50)
Other packages that cited irt R package
View irt citation profile
Other R packages that irt depends, imports, suggests or enhances
Complete documentation for irt
Functions, R codes and Examples using the irt R package
Some associated functions: GPCM-class . GPCM2-class . GRM-class . Item-class . Itempool-class . M2PL . M3PL . PCM-class . Rasch-class . Response-class . Response_set-class . Testlet-class . add_misc . area_between_icc . as.Itempool . as.data.frame.Response . as.data.frame.Response_set . as.data.frame.cat_output . as.data.frame . as.list.Itempool . as.list.Response_set . as.matrix-Response_set-method . biserial . c.cat_design . c . calculate_exposure_rates . calculate_overlap_rates . cash-.cat_output . cash-Item-method . cash-Itempool-method . cash-Response-method . cash-Response_set-method . cash-Testlet-method . cash-set-Item-method . cash-set-Itempool-method . cash-set-Response-method . cash-set-Response_set-method . cash-set-Testlet-method . cat_sim . cat_sim_fast . classification_agreement_index . classification_indices . convert_model . create_cat_design . cusum_single . dif . distractor_analysis . dot-print.Testlet . est_ability . est_bilog . est_flexmirt . generate_ip . generate_item . generate_resp . generate_resp_set . generate_testlet . get_cat_administered_items . get_cat_response_data . get_max_possible_total_score . info . ipd . irt . irt1PL . irt2PL . irt3PL . irt4PL . is . item . item_analysis . item_fit . itempool . ks . length . max_score . mean.Item . mean.Itempool . mean.Testlet . person_fit . plot.Item . plot.Itempool . plot.cat_output . plot.ks_output . plot_distractor_icc . plot_empirical_icc . plot_empirical_icc2 . plot_info . plot_resp_loglik . point_biserial . print-Itempool-method . print-Response-method . print-Response_set-method . print.Item . print.bilog_output . print.cat_design . print.cat_output . prob . prob_sum_score . qip_index . resp_lik . resp_loglik . response . response_set . rmsd . rsss . score_info . score_raw_resp . show.cat_output . show . sim_resp . sub-Itempool-ANY-missing-method . sub-Testlet-ANY-missing-method . sub-sub-Itempool-numeric-missing-method . sub-sub-Response_set-numeric-missing-method . sub-sub-Testlet-numeric-missing-method . sub-subset-Itempool-numeric-missing-method . sub-subset-Response_set-numeric-missing-method . sub-subset-Testlet-numeric-missing-method . subset-response_set . summary.cat_output . summary.list . testlet . var.Item . var.Itempool . var.Testlet . 
Some associated R codes: RcppExports.R . ability_estimation.R . bilog.R . cat_sim.R . cat_sim_helper_functions.R . classification.R . dif.R . flexMIRT.R . generate_objects.R . info.R . ipd.R . irt.R . item-class-methods.R . item-class.R . item_analysis.R . item_fit.R . itempool-class-methods.R . itempool-class.R . kernel_smoothing.R . max_score.R . mean.R . misc.R . person_fit.R . plot_cat_output.R . plot_distractor_icc.R . plot_icc.R . plot_info.R . plot_item.R . plot_itempool.R . plot_ks.R . plot_resp_loglik.R . prob.R . resp_lik.R . resp_loglik.R . response-class-methods.R . response-class.R . response_set-class-methods.R . response_set-class.R . rsss.R . sim_resp.R . testlet-class-methods.R . var.R . zzz.R .  Full irt package functions and examples
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