News

cIRT 1.2.1

• Added src/init.c for R 3.4 compatibility
• Added GitHub project page link

cIRT 1.2.0

• Added two vignettes that cover the model estimation and simulation results in the package.
• Added a NEWS.md file to track changes to the package.

cIRT 1.1.0

• Adds two columns to choice matrix: hard_q_id and easy_q_id.

cIRT 1.0.0

Modeling Framework

• Implementation of the hiercharical framework described in "A Hierarchical Model for Accuracy and Choice on Standardized Tests"
• Specifically, a choice inclusive Probit HLM and a Two Parameter Ogive Model.

C++ Functions

• Random Number Generation for the following distributions: Wishart, Inverse Wishart, and Multivariate Normal
• Matrix Centering
• Direct Sum calculation

Data

• Student Performance on Revised Purdue Spatial Visualization Test (Revised PSVT:R) by Yoon, 2011 in trial_matrix
• The choices students made among items presented to them in choice_matrix
• The end payout results for students based on their choices in payout_matrix
• One additional data set exists containing the student's sex response in survey_data

Reference manual