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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 £1500 per day + 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. Legacy Concerto Versions 3 and 4 help files, tutorials and demos 
  3. Please report any issues here


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)

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