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2005m
kit:Data Manipulation Functions Implemented in C
Basic functions, implemented in C, for large data manipulation. Fast vectorised ifelse()/nested if()/switch() functions, psum()/pprod() functions equivalent to pmin()/pmax() plus others which are missing from base R. Most of these functions are callable at C level.
Maintained by Morgan Jacob. Last updated 7 months ago.
58 stars 9.11 score 92 scripts 5 dependents
irtools
irtoys:A Collection of Functions Related to Item Response Theory (IRT)
A collection of functions useful in learning and practicing IRT, which can be combined into larger programs. Provides basic CTT analysis, a simple common interface to the estimation of item parameters in IRT models for binary responses with three different programs (ICL, BILOG-MG, and ltm), ability estimation (MLE, BME, EAP, WLE, plausible values), item and person fit statistics, scaling methods (MM, MS, Stocking-Lord, and the complete Hebaera method), and a rich array of parametric and non-parametric (kernel) plots. Estimates and plots Haberman's interaction model when all items are dichotomously scored.
Maintained by Ivailo Partchev. Last updated 3 years ago.
3 stars 5.39 score 55 scripts 5 dependents
quinn-lathrop
cacIRT:Classification Accuracy and Consistency under Item Response Theory
Computes classification accuracy and consistency indices under Item Response Theory. Implements the total score IRT-based methods in Lee, Hanson & Brennen (2002) and Lee (2010), the IRT-based methods in Rudner (2001, 2005), and the total score nonparametric methods in Lathrop & Cheng (2014). For dichotomous and polytomous tests.
Maintained by Quinn N. Lathrop. Last updated 10 years ago.
1 stars 1.00 score 8 scripts