skip to content

The Psychometrics Centre

Cambridge Judge Business School

Computer-Adaptive Testing Made Easy

Now anyone can create online assessments, from simple surveys to sophisticated IRT-based computer-adaptive tests (CATs) with textual and graphical feedback. Concerto uses the powerful R statistical programming language, which you can use to do any calculations your test requires. Concerto is free for academic and commercial use. There are no set-up costs, no hidden licence fees and no limitations.

Click here to get started with Concerto


Concerto is free, but we are glad to help with:

  • The installation and maintenance of Concerto on your server
  • Managed hosting options for professional administration
  • Designing and running Concerto tests
  • Designing a test layout and customised templates
  • Analysing results and deriving IRT item parameters
  • Developing new test items
  • Participant recruitment and data collection
  • Training your staff to get the most out of Concerto. More info here

Our standard rates for psychometric and technical support with Concerto are £200 per hour + VAT. VAT rates will differ depending on your location and on whether you are an individual or business. Contact us for information.


  1. Workshops
  2. Tutorials and Documentation
  3. Please report any issues here
  4. Legacy Concerto Versions 3 and 4 (discontinued) 


Harrison, C., Loe, B. S., Lis, P., & Sidey-Gibbons, C. (2020). Maximizing the Potential of Patient-Reported Assessments by Using the Open-Source Concerto Platform With Computerized Adaptive Testing and Machine Learning. Journal of Medical Internet Research, 22(10), e20950. 

Scalise, K. & Allen, D. D. Use of open-source software for adaptive measurement: Concerto as an R-based computer adaptive development and delivery platform. Br. J. Math. Stat. Psychol. 68, 478–496 (2015)

Oppl, S., Reisinger, F., Eckmaier, A. A flexible online platform for computerized adaptive testing.Int J Educ Technol High Educ. 14, 2 (2017)


Upcoming events