Welcome to VPG Online Store

Vector Psychometric Group (VPG) is proud to offer cutting-edge software for web-based data collection and item response data analysis.

  • flexMIRT®, VPG’s flagship IRT software, has some of the richest psychometric and statistical features defining the state of the art. With the ability to be installed and called remotely, flexMIRT® is ideal for the individual analyses of an applied researcher or the large-scale analyses and scoring needed for operational use.
  • IRTPRO™, with its intuitive graphical user interface, built-in data management capacity, high quality graphics, and a professional HTML-based output delivery system, have become widely adopted by educators, researchers, and assessment professionals.
  • Adaptest®, our web-based computerized adaptive testing (CAT) engine, has been updated to a “plug-in,” allowing any existing electronic data collection system (EDC) to administer adaptive tests and provide real-time scoring with minimal modifications.

Through the end of 2020, we are happy to offer a 5% discount to select flexMIRT® and IRTPRO™ license types. Simply use the discount code: DISCOUNT2020 at check out. 

Featured products

flexMIRT®

Regular flexMIRT license
€1677.00

IRTPRO™

Purchasing a license for IRTPRO™ is easy. You can purchase and download a regular non-operational copy of IRTPRO™ from within My Account. Annual licenses are available for single users (3 installs) for $1,950 per year. Additional users can be added to your annual license for only $325 per user (3 installs). If you would like to add additional installs to a single license or link multiple user accounts under one license, please contact us for more information.
€1677.00

flexMIRT® - Academic

flexMIRT® for Student and Faculty
€279.50

IRTPRO™ - Academic

IRTPRO™ for Student and Faculty
€279.50

IRTPRO™ - Basic (12 months)

Purchasing a license for IRTPRO™ is easy. You can purchase and download a basic non-commercial, academic, and educational copy of IRTPRO™ from within My Account. Annual licenses are available for single users, one seat for $225 per year. If you would like to link multiple user accounts under one license, please contact us for more information. Please note that no technical support is provided with the basic version.
€193.50

IRTPRO™ - Basic (6 months)

Purchasing a license for IRTPRO™ is easy. You can purchase and download a basic non-commercial, academic, and educational copy of IRTPRO™ from within My Account. Six month licenses are available for single users, one seat for $115 per year. If you would like to link multiple user accounts under one license, please contact us for more information. Please note that no technical support is provided with the basic version.
€98.90

IRTPRO™ - Basic (3 months)

Purchasing a license for IRTPRO™ is easy. You can purchase and download a basic non-commercial, academic, and educational copy of IRTPRO™ from within My Account. Annual licenses are available for single users, one seat for $65 for three months. If you would like to link multiple user accounts under one license, please contact us for more information. Please note that no technical support is provided with the basic version.
€55.90

flexMIRT® - Trial

Registered users have access to a single installation, two-week free trial. The trial version is a fully functional flexMIRT® software package. The free trial is offered to provide users with an opportunity to evaluate the program prior to purchase. Please note, the free versions of the software are for EVALUATION PURPOSES ONLY and come with no warranties and only limited technical support. Free trials are not to be used for commercial or operational purposes without the express written consent of Vector Psychometric Group, LLC.
€0.00

IRTPRO™ - Trial

Registered users have access to a single installation, two week free trial. The trial version is a fully functional IRTPRO software package. The free trial is offered to provide users with an opportunity to evaluate the program prior to purchase. Please note, the free versions of the software are for EVALUATION PURPOSES ONLY and come with no warranties and only limited technical support. Free trials are not to be used for commercial or operational purposes without the express written consent of Vector Psychometric Group, LLc. To become a registered user go to My Account to create an account. Once your account has been verified you will be able to download the trial software, purchase licenses, and review your existing license status.
€0.00

flexMIRT® - Operational

Entities interested in using flexMIRT® for operational purposes including, but not limited to, test/assessment calibration, scoring, linking or standard setting for a client, product, or student/employee evaluation should contact us for licensing options. Please note that these activities are not covered under the standard or academic end-user agreements.

IRTPRO™ - Operational

Entities interested in using IRTPRO™ for operational purposes including, but not limited to, test/assessment calibration, scoring, linking or standard setting for a client, product, or student/employee evaluation should contact us for licensing options. Please note that these activities are not covered under the standard or academic end-user agreements. Email: sales@vpgcentral.com Phone: 919.768.7142 Fax: 919.768.7134

flexMIRT® - Evaluation

flexMIRT - Evaluation
€1677.00