In Pflegermeister/wizirt2: A United API for IRT in R

wizirt 0.1.62

Package Overview

The wizirt package (currently named wizirt2) is up and running, it seems to work for different data sets. It has a limited functionality, but it is currently working.

The wizirt package represents the work of my dissertation. As such I have agreed to do the following for my dissertation:

• Provide general model information including:
• Model call
• Description of model run
• Software and version
• Estimator
• Convergence status, criteria, values
• Estimation issues
• Response data described (sample size, demographics)
• Descriptions of items and test
• Missing data summary

• Description of missing data handling

• Provide model fit information

• Unidimensionality (DETECT)
• Absolute fit
• Relative fit

• Anova method for comparing models

• Provide item information

• Parameter estimates

• Summary statistics

• Provide item-fit information

• Conditional dependence
• Functional form (isn't this model-data fit?)
• Fit statistics
• predicted vs observed item response functions

• misfitting items flagged

• Provide person information

• Person location estimates (including SE)

• Provide person-fit information

• Global detection (Ht, lz*, infit and outfit, with cutoffs where applicable)
• Local detection (ICI or other)
• Tabulation or presentation of response patterns (winsteps tables as guides)
• PRF (nonparametric, parametric may follow later)

• MLM (Reise, Conijn)

• Two levels of accessibility

• Comprehensive report for beginners

• Felxible functions for advanced users

• Learning Resources

• Github website
• CRAN-style reference page
• tidyverse-style cheat sheet

• Karabatsos's simulation replication article

• Quality Assurance

• Accuracy check
  • Match IRTPRO, Winsteps
  • Replicate Karabatsos
• Informative check (meet all the checks above two levels...)
• Usefulness check
  • Usability testing
  • Call it from python on separate laptop
• Aesthetics check
  • Repetition
  • Contrast
  • Alignment
  • Proximity

My goal is to complete all of this by October 24. That will give me a week to write it all up by October 30 and give it to my chair. Then I will have a week to improve it according to my chair's recommendations so I can send it to my committee by November 6.

Pflegermeister/wizirt2 documentation built on Oct. 23, 2020, 1:29 a.m.