The open-source online adaptive testing platform

Use Concerto

The future of adaptive testing is universal and user-friendly. That's why the Concerto platform is completely free to use, forever.



We provide end-to-end solutions to help you implement online adaptive testing in high-stakes environments. Get the most out of Concerto by combining the freedom of open source with the confidence of tailored support from the University of Cambridge Psychometrics Centre.


Discover Your Team Role

Perfectionist, Pragmatist, Mediator, Innovator or Motivator? Find out your team role and the bridge it is symbolised by with this short Concerto test.

Adaptive Quality of Life Test

Try this adaptive and predictive version of the World Health Organisation’s Quality of Life assessment. Thanks to IRT, CAT and Concerto, this version is up to 75% shorter, has higher reliability in all sub-scales and provides instant feedback.

Test your Face IQ

Assess your face perception, emotion recognition, object memory and more with this diverse battery of visual tests in Concerto

Adaptive Numerical Reasoning Test

This numerical sequence assessment uses state-of-the-art adaptive scoring algorithms to optimise the difficulty of items based on the numeric cognitive ability of the respondent.

Double 3D Spatial Rotation

How well can you manipulate and match shapes in 3D? This challenging cognitive test uses automatic item generation to present unique spatial reasoning items

Relationship Assessment

The Golombok-Rust Inventory of Marital State is used by researchers, counsellors and other professionals to assess marital or cohabiting relationship quality and to monitor progress over time

See how others are using Concerto

More Examples


The University of Cambridge Psychometrics Centre believes that online adaptive testing should be available to everyone. That is why we’ve built Concerto: a powerful and user-friendly platform that empowers experts and beginners alike to make better tests, without needing to write a single line of code. There are no set-up costs, no hidden licence fees and no limitations. This ensures our community of researchers and practitioners can take on both short and long term assessment projects with confidence.

Concerto harmonises the statistical power of the R programming language, the security of MySQL databases and the flexibility of HTML to deliver an outstanding performance. These instruments work in unison, giving users unparalleled freedom and control over the design of their assessments. In-built algorithms for score calculation and report generation ensure a rewarding experience for participants, whatever the context.

Our Team

Przemyslaw Lis
Co-founder & Lead Developer
Dr. David Stillwell
Academic Director
Vesselin Popov
Commercial Director
Prof. John Rust
Dr. Chris Gibbons
Health Director

Join Our Community

Concerto is an open platform, and we love to hear about its diverse applications. Sign up below to receive occasional updates on upcoming workshops, new features and more from our diverse community.