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flexMIRT是可用的先进的IRT软件，一个用于项目分析和测试评分的多层次、多维和多组项目反应理论（IRT）软件包。flexMIRT适用于各种一维和多维项目反应理论模型（也称为项目因素分析模型）以及诊断分类模型，适用于任一数量组的单水平和多水平数据。
flexMIRT是易于使用的
基于Windows的flexMIRT具有图形用户界面（GUI），有64位版本。它具有直观的语法，可以在命令行模式下无缝运行，以实现大批量生产。用户手册演示了各种带有注释的输入和输出的分析。
flexMIRT是灵活的
我们的IRT软件可以适用于各种项目级模型，包括1PL、2PL、3PL、分级响应模型、广义部分信用模型和诊断分类模型。它能够适应多个维度、数据内的依赖性（即多水平）、交叉随机效应、协变量和潜在特征的偏离正态性。
flexMIRT是快速的
随着现代CPU架构朝着多核设计的方向发展，flexMIRT使用并行处理，通过将负载自动分配到多个可用的核心或处理单元来进一步加快计算速度。在可能的情况下，flexMIRT使用降维来自动减少多维或多级模型的集成维数。
flexMIRT可以处理大型数据集
一种新设计的内存分配方案有助于flexMIRT有效地处理数千个项目和数百万受访者。适合需要物品反应理论模型的任一尺寸分析。
支持的版本
稳定版本：版本 3.6.5
候选版本：不适用
已弃用版本：版本 3.5x
所有支持的版本：版本 3.0+
注意：
目前，目前不提供任一程序的本机Mac版本。但是，如果您有双启动设置或 Windows 模拟器，只要您的硬件由于已知的兼容性问题而不使用 Apple 专有的基于 ARM 的芯片，任一程序都应该正常运行。请注意，只能提供对使用该软件的支持，无法提供有关设置 Mac 以允许程序可用的指导。Parallels Desktop 是常用的模拟器。VirtualBox是Oracle的免费替代品，但与Parallels相比，它可能有点慢。
英文：
A multilevel, multidimensional, and multiple group item response theory (IRT) software package for item analysis and test scoring. flexMIRT fits a variety of unidimensional and multidimensional item response theory models (also known as item factor analysis models) as well as diagnostic classification models to single-level and multilevel data in any number of groups.
flexMIRT is easy to use
Windows-based flexMIRT has a graphical user interface (GUI) and is available in 64-bit version. It has an intuitive syntax and can be run seamlessly in a command line mode for high volume production. The user’s manual demonstrates a variety of analyses with annotated input and output.
flexMIRT is flexible
Our IRT software can fit a wide variety of item-level models including 1PL, 2PL, 3PL, Graded Response Model, Generalized Partial Credit Model, and Diagnostic Classification Models. It is able to accommodate multiple dimensions, dependence within the data (i.e., multilevel), crossed random effects, covariates, and departures from normality in the latent trait(s).
flexMIRT is fast
As modern CPU architecture trends toward multi-core design, flexMIRT uses parallel processing to further speed up computations by spreading the load automatically to the multiple available cores or processing units. When possible, flexMIRT uses dimension reduction to automatically reduce the number of dimensions of integration for multidimensional or multilevel models.
flexMIRT can handle large datasets
A newly-designed memory allocation scheme helps flexMIRT efficiently handle thousands of items and millions of respondents. Great for any size analysis where item response theory models are needed.
Supported Versions-flexMIRT
Stable release: Version 3.6.5
Release candidate: n/a
Deprecated versions: Versions 3.5x
All supported versions: Versions 3.0+
Note:
Currently we offer no native Mac version of any of our programs currently available. However, if you have a dual-boot set-up or a Windows emulator, any of our programs should run without issues as long as your hardware is not using Apple’s proprietary ARM-based chips because of known compatibility issues. Note that we can only provide support for using the software and are unable to provide guidance on setting up a Mac to allow for a program to be usable. Parallels Desktop is the most frequently used of the emulators. VirtualBox is a free alternative from Oracle, but it can be very slow compared to Parallels.
