Welcome

jMetrik™ 3.1 is now available! Version 3.1 is a siginificant revision to jMetrik that adds new functionality for item response theory and creating graphs. The program is available for free from the download page. Free technical support is no longer offered. Please purchase a support plan to ask questions by email. Paid workshops will continue to be available online each January and August. If your organization would like to arrange for a workshop at a different time, either online or in person, please contact customer support.

jMetrik is a free and open source computer program for psychometric analysis. (See who is using jMetrik.) It features a user-friendly interface, integrated database, and a variety of statistical procedures and charts. The interface is intuitive and easy to learn. It also scales to the experience of the user. New users can quickly learn to implement psychometric procedures though point-and-click menus. Experienced users can take advantage of the jMetrik command structure and write command files for executing an analysis.

jmetrik image\jMetrik’s embedded database increases productivity by providing a common data format for all of its methods. There is no need to reformat or reshape data for each procedure. The database is the primary mechanism for data management. There is virtually no limit to the sample size or number of tables that can be stored in the database. Users are only limited by the amount of storage on their computer. After importing data into jMetrik, users can create subsets of data by selecting examinees or variables. Users can also create new tables by saving the results of an analysis in the database for further processing.

Statistical methods available in jMetrik include frequencies, correlations, descriptive statistics and a variety of graphs. Psychometric methods include classical item analysis, reliability estimation, test scaling, differential item functioning, nonparametric item response theory, Rasch measurement models, and item response theory linking and equating. New methods are added to each new version of the program. View a complete list of jMetrik features.

jMetrik is a pure Java application. It runs on Windows, Max OSX, and Linux operating systems. Installation files include the needed version of Java Virtual Machine. Just download the installer and double click the icon to begin the installation process.