Software Database

This database was constructed by Dr. Gary Skaggs as a repository of information on software created to perform or assist with psychometric analyses.

It was created with support from the NCME Bradley Hanson Award. The database was last updated in July 2019.

Use the search and filter functions to find a certain software or narrow options by analysis, license, and measurement model.


Term
2021–2022
Organization
University of Colorado–Boulder
Term
2022–2023
Organization
University of Iowa
Software License
Commercial
Measurement Model
Rasch
Analysis
Dimensionality, Multidimensional Models
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Equating
Software License
Commercial
Measurement Model
Item Response Theory, Rasch
Analysis
Equating
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Attitude Scaling, Item & Test Analysis, Scaling, Scoring
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Item & Test Analysis, Multidimensional Models, Rater Effects, Scaling, Scoring
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Multidimensional Models; Simulation/Resampling
Software License
Commercial
Measurement Model
Item Response Theory; Rasch
Analysis
Simulation/Resampling; Test Construction & Administration
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Equating
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Differential Item Functioning
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Equating
Name
Software License
Commercial
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Scaling; Scoring

CDM

Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Equating
Name
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Equating
Name
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Item & Test Analysis
Name
Measurement Model
Classical Test Theory
Analysis
Equating
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Differential Item Functioning; Item & Test Analysis; Rater Effects; Scaling; Scoring
Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Software License
Freeware
Measurement Model
Rasch
Analysis
Item & Test Analysis; Scoring
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Item & Test Analysis; Reliability
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Attitude Scaling
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Factor/Latent Structure; Item & Test Analysis; Scaling; Scoring

CTT

Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Attitude Scaling
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Dimensionality; Factor/Latent Structure; Item & Test Analysis; Multilevel Data; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Multilevel Data
Software License
Open-Source
Measurement Model
Item Response Theory; Rasch
Analysis
Differential Item Functioning; Dimensionality
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Latent Class Models; Multilevel Data
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Cognitive Diagnostic Models; Item & Test Analysis; Multidimensional Models
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Differential Item Functioning; Dimensionality; Factor/Latent Structure; Item & Test Analysis; Multidimensional Models
Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Generalizability
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Latent Class Models
Software License
Open-Source
Measurement Model
Latent Structure
Analysis
Factor/Latent Structure; Multidimensional Models; Multilevel Data; Simulation/Resampling; Validity
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Multilevel Data; Simulation/Resampling
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Interrater Reliability
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Simulation/Resampling
Name
Software License
Commercial
Measurement Model
Item Response Theory; Rasch
Analysis
Cognitive Diagnostic Models; Item & Test Analysis; Latent Class Models
Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Differential Item Functioning; Equating; Item & Test Analysis; Scaling; Scoring
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Differential Item Functioning; Dimensionality; Factor/Latent Structure; Reliability; Scaling; Scoring; Simulation/Resampling;
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Differential Item Functioning
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Equating

eRm

Name
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Person Fit/Cheating
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Differential Item Functioning; Dimensionality; Factor/Latent Structure; Item & Test Analysis; Multidimensional Models; Person Fit/Cheating; Rater Effects; Scoring
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Scaling; Scoring
Name
Software License
Open-Source
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure
Software License
Open-Source
Measurement Model
Latent Structure
Analysis
Cognitive Diagnostic Models; Dimensionality; Factor/Latent Structure; Item & Test Analysis; Latent Class Models; Multidimensional Models; Multilevel Data; Simulation/Resampling; Validity
Name
Software License
Commercial
Measurement Model
Rasch
Analysis
Test Construction & Administration
Name
Software License
Commercial
Measurement Model
Rasch
Analysis
Test Construction & Administration
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Scaling; Scoring
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Dimensionality; Factor/Latent Structure; Item & Test Analysis
Software License
Commercial
Measurement Model
Utilities
Analysis
Equating
Name
Software License
Open-Source
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis
Software License
Commercial
Measurement Model
Item Response Theory; Rasch
Analysis
Commercial
Name
Software License
Open-Source
Measurement Model
Item Response Theory; Rasch
Analysis
Scoring; Test Construction & Administration

G1

Name
Software License
Open-Source
Measurement Model
Classical Test Theory
Analysis
Dimensionality; Item & Test Analysis; Multidimensional Models
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Generalizability
Name
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Attitude Scaling; Differential Item Functioning; Item & Test Analysis; Scaling; Scoring
Name
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Attitude Scaling, Differential Item Functioning, Item & Test Analysis, Scaling, Scoring
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory, Rasch
Analysis
Attitude Scaling, Equating, Scaling
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Factor/Latent Structure; Item & Test Analysis; Latent Class Models; Multidimensional Models; Multilevel Data; Simulation/Resampling
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Reliability; Scaling; Scoring
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Scaling; Scoring
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Multilevel Data; Reliability
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Scoring; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Item & Test Analysis; Person Fit/Cheating

HLM

Name
Software License
Commercial
Measurement Model
Statistical
Analysis
Item & Test Analysis; Simulation/Resampling
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
> Item & Test Analysis; Reliability; Scoring
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Simulation/Resampling; Test Construction & Administration
Name
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Equating
Software License
Commercial
Measurement Model
Utilities
Analysis
Differential Item Functioning; Item & Test Analysis

irr

Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Equating

IRT

Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Equating
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Differential Item Functioning; Dimensionality; Equating; Latent Class Models; Multidimensional Models; Multilevel Data; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Multidimensional Models; Scoring
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Equating; Multidimensional Models
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Scaling; Scoring
Name
Software License
Commercial
Measurement Model
Item Response Theory; Rasch
Analysis
Factor/Latent Structure; Multidimensional Models; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Scoring
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Generalizability
Name
Software License
Commercial
Measurement Model
Classical Test Theory
Analysis
Differential Item Functioning
Software License
Open-Source (R)
Measurement Model
Item Response Theory, Rasch
Analysis
Attitude Scaling, Differential Item Functioning, Item & Test Analysis, Latent Class Models, Person Fit/Cheating, Reliability, Simulation/Resampling, Test Construction & Administration
Name
Software License
Open-Source
Measurement Model
Classical Test Theory
Analysis
Equating; Item & Test Analysis; Reliability
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Differential Item Functioning; Item & Test Analysis; Person Fit/Cheating; Rater Effects; Scaling; Scoring
Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Differential Item Functioning; Equating; Item & Test Analysis; Scoring
Software License
Commercial
Measurement Model
Latent Structure
Analysis
Multidimensional Models; Simulation/Resampling; Test Construction & Administration
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Dimensionality; Factor/Latent Structure; Item & Test Analysis
Name
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Dimensionality; Item & Test Analysis; Multidimensional Models
Name
Software License
Commercial
Measurement Model
Classical Test Theory
Analysis
Differential Item Functioning
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Multidimensional Models
Name
Software License
Commercial
Measurement Model
Latent Structure
Analysis
Generalizability
Name
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Differential Item Functioning; Equating; Item & Test Analysis; Reliability; Scaling; Scoring
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Item & Test Analysis; Latent Class Models; Multidimensional Models
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Differential Item Functioning

ltm

Name
Software License
Open-Source
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis

MAT

Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Equating; Scaling
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Factor/Latent Structure; Latent Class Models; Multidimensional Models; Reliability; Simulation/Resampling; Validity
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Simulation/Resampling; Test Construction & Administration
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure
Name
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Cognitive Diagnostic Models; Differential Item Functioning; Item & Test Analysis; Latent Class Models; Multidimensional Models; Multilevel Data; Person Fit/Cheating; Scaling
Term
2023–2024
Organization
Educational Testing Service
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Item & Test Analysis; Reliability; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Interrater Reliability; Rater Effects; Reliability
Software License
Freeware
Measurement Model
Statistical
Analysis
Attitude Scaling, Person Fit/Cheating, Simulation/Resampling
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Attitude Scaling; Dimensionality; Factor/Latent Structure; Generalizability; Interrater Reliability; Interrater Reliability; Item & Test Analysis; Multidimensional Models; Reliability; Scaling; Scoring; Simulation/Resampling
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Factor/Latent Structure; Multidimensional Models; Person Fit/Cheating; Simulation/Resampling
Name
Software License
Commercial
Measurement Model
Statistical
Analysis
Dimensionality; Factor/Latent Structure; Multidimensional Models; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Item & Test Analysis; Multidimensional Models; Simulation/Resampling
Name
Software License
Commercial
Measurement Model
Latent Structure
Analysis
Interrater Reliability; Interrater Reliability; Item & Test Analysis; Multilevel Data; Reliability

mRm

Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Attitude Scaling
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Scaling; Scoring
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Factor/Latent Structure; Multidimensional Models
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Item & Test Analysis; Scoring; Simulation/Resampling; Test Construction & Administration
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Reliability; Test Construction & Administration
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Latent Class Models; Multidimensional Models
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Differential Item Functioning; Mixture Models
Software License
Commercial
Measurement Model
Item Response Theory; Rasch
Analysis
Differential Item Functioning; Item & Test Analysis; Reliability
Name
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Attitude Scaling; Item & Test Analysis; Person Fit/Cheating; Scoring
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Cognitive Diagnostic Models; Dimensionality; Latent Class Models; Multidimensional Models; Simulation/Resampling

PIE

Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Cognitive Diagnostic Models; Dimensionality; Item & Test Analysis; Latent Class Models; Multidimensional Models
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Item & Test Analysis; Scaling; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Item & Test Analysis; Latent Class Models; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Item & Test Analysis; Latent Class Models; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Utilities
Analysis
Item & Test Analysis; Scoring; Simulation/Resampling; Test Construction & Administration
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Equating; Scoring
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Scoring; Simulation/Resampling

PP

Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Differential Item Functioning
Software License
Commercial
Measurement Model
Item Response Theory; Rasch
Analysis
Differential Item Functioning; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Differential Item Functioning
Software License
Open-Source (R)
Measurement Model
Statistical
Analysis
Differential Item Functioning; Simulation/Resampling
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Differential Item Functioning; Simulation/Resampling
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Test Construction & Administration

qcv

Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Item & Test Analysis; Simulation/Resampling; Test Construction & Administration
Name
Software License
Freeware
Measurement Model
Statistical
Analysis
Factor/Latent Structure; Multidimensional Models; Multilevel Data
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Item & Test Analysis; Simulation/Resampling
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Item & Test Analysis
Software License
Open-Source (R)
Measurement Model
Rasch
Analysis
Factor/Latent Structure; Multilevel Data
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Reliability
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Item & Test Analysis; Multilevel Data
Name
Software License
Commercial
Measurement Model
Rasch
Analysis
Item & Test Analysis; Multilevel Data; Rater Effects
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Multidimensional Models; Scoring
Name
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Dimensionality; Factor/Latent Structure; Multidimensional Models

sem

Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Dimensionality; Factor/Latent Structure; Multidimensional Models
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Dimensionality; Factor/Latent Structure; Multidimensional Models
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Dimensionality; Factor/Latent Structure; Multidimensional Models
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Dimensionality; Factor/Latent Structure; Multidimensional Models
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure
Name
Software License
Open-Source
Measurement Model
Classical Test Theory
Analysis
Dimensionality; Factor/Latent Structure
Name
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Dimensionality; Factor/Latent Structure
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Simulation/Resampling
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Simulation/Resampling
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Multidimensional Models
Software License
Open-Source (R)
Measurement Model
Latent Structure
Analysis
Dimensionality; Factor/Latent Structure
Software License
Commercial
Measurement Model
Latent Structure
Analysis
Dimensionality; Factor/Latent Structure

ST

Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Item & Test Analysis; Reliability
Name
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Reliability
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Scaling; Scoring
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Validity

TAM

Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Cognitive Diagnostic Models; Factor/Latent Structure; Latent Class Models; Simulation/Resampling
Software License
Commercial
Measurement Model
Item Response Theory; Rasch
Analysis
Factor/Latent Structure; Latent Class Models; Multidimensional Models
Software License
Open-Source (R)
Measurement Model
Classical Test Theory
Analysis
Factor/Latent Structure; Latent Class Models; Multidimensional Models
Software License
Freeware
Measurement Model
Classical Test Theory
Analysis
Dimensionality; Factor/Latent Structure; Multidimensional Models
Software License
Open-Source
Measurement Model
Item Response Theory; Rasch
Analysis
Factor/Latent Structure; Multidimensional Models; Simulation/Resampling
Name
Software License
Freeware
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Latent Class Models; Multidimensional Models
Name
Software License
Commercial
Measurement Model
Rasch
Analysis
Generalizability
Software License
Commercial
Measurement Model
Rasch
Analysis
Cognitive Diagnostic Models; Latent Class Models; Multidimensional Models; Simulation/Resampling
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Software License
Commercial
Measurement Model
Item Response Theory; Rasch
Analysis
Attitude Scaling; Item & Test Analysis; Simulation/Resampling
Name
Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Scaling; Scoring; Test Construction & Administration