The Project

The International Cognitive Ability Resource is a public-domain assessment tool which aims to encourage the broader assessment of cognitive abilities in psychology and other social sciences and facilitate neuropsychological assessment in medical research and practice. The collaborators working on this project believe that the best way to achieve this aim is by making it easier for research scientists to employ flexible and unrestricted measures which have been well-validated against one another.

We hope this site will further this aim by:
  • distributing the resources which are currently available (the existing "item types")
  • providing psychometric information about these resources
  • encouraging researchers to develop and contribute item types for use (and validation) by others

The success of this project is dependent on the collaborative involvement of international cognitive ability researchers and, more broadly, scientists from a wide variety of disciplines. With that spirit in mind, we hope you will share your expertise, your feedback and your support.

The ICAR project is jointly funded by the National Science Foundation (NSF) in the US, the Deutsche Forschungsgemeinschaft (DFG) in Germany, and the Economic and Social Research Council (ESRC) in the UK as part of the Open Research Area Plus for the Social Sciences (NSF: SMA-1419324; DFG: DO 1789/1-1, ESRC: ES/L016591/1). We acknowledge funding for the continued improvement of the ICAR by The Eric and Wendy Schmidt Fund for Strategic Innovation.
We are extremely grateful for their generous support.

Important information about registration. Please read it through carefully.
  • If you want to find out more about the project and the resources currently available, please register (which allows access to the wiki only) and visit our wiki (after your registration has been approved, which usually takes less than 3 days).
  • Our Data Protection Statement is available here:
  • A brief summary of existing ICAR measures and sample items are available at
  • If you want to gain access to a specific item type or a brief cognitive ability measure, please fill in the application form (after registering yourself on this website, i.e. the step above, as your login info will be required). Please allow up to one week for us to process your registration. There is no automatic notification of the process result. Please come back later and check if you can access the item types section, where you will find all ICAR measures available, if your application has been approved. Sorry for the inconvenience.
  • If you want to collaborate or develop your own item type, please contact the ICAR core team at .

Citing ICAR scales

If not specified by authors of specific item types, you are encouraged to acknowledge the ICAR project by citing our website: The International Cognitive Ability Resource Team (2014).

ICAR core team