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ClassicalTestTheory.jl\n\n[![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://p-gw.github.io/ClassicalTestTheory.jl/stable)\n[![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://p-gw.github.io/ClassicalTestTheory.jl/dev)\n[![Build Status](https://github.com/p-gw/ClassicalTestTheory.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/p-gw/ClassicalTestTheory.jl/actions/workflows/CI.yml?query=branch%3Amain)\n[![Coverage](https://codecov.io/gh/p-gw/ClassicalTestTheory.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/p-gw/ClassicalTestTheory.jl)\n\nClassicalTestTheory.jl is a Julia package for data analysis using [Classical Test Theory](https://en.wikipedia.org/wiki/Classical_test_theory#:~:text=It%20is%20a%20theory%20of,the%20reliability%20of%20psychological%20tests.).\n\n## Installation\n```julia\n] add https://github.com/p-gw/ClassicalTestTheory.jl.git\n```\n\n## Getting started\nClassicalTestTheory.jl provides two entry points to doing data analsis. \nThe input data can either be a numeric `Matrix` or a [`PsychometricTest`](https://github.com/JuliaPsychometrics/PsychometricTests.jl). \nWhile `Matrix` methods provide full functionality, `PsychometricTest` methods provide some \nadditional convenience such as scale analysis. \nFor details on how to use ClassicalTestTheory.jl with `PsychometricTest` see [XXX](#).\n\nConsider some input data `x`,\n\n```julia-repl\njulia\u003e n_persons = 100;\njulia\u003e n_items = 8;\n\njulia\u003e x = rand(0:100, n_persons, n_items);\n```\n\nwe can get some descriptive analysis of the items,\n\n```julia\nitemanalysis(x)\n```\n\nor estimate the internal consistency (e.g. using Cronbach's alpha)\n\n```julia\nreliability(x, Alpha())\n```\n\nThe package will automatically calculate the coefficient from the data and construct appropriate confidence intervals.\n\nTo get multiple estimates of reliability just pass a vector of methods:\n\n```julia\ncoefficients = [Alpha(), GLB(), Mu(2)]\nreliability(x, coefficients)\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fp-gw%2Fclassicaltesttheory.jl","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fp-gw%2Fclassicaltesttheory.jl","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fp-gw%2Fclassicaltesttheory.jl/lists"}