Notes for Users

The ICAR can be found at the Leibniz-Institut für Psychologie at https://doi.org/10.23668/psycharchives.22167 It exclusively available for academic use. Please see the following FAQ for details.

FAQ

What is the license for ICAR?

The ICAR is distributed at PsychArchives under a Scientific Use License 1. Please find the license text here: https://www.psycharchives.org/en/item/7466aa16-69bd-49ea-baef-7f828f5b223f

Can I use ICAR materials for a research project as part of my Bachelor's, Master's or PhD thesis? 

In general yes, if the research you are conducting is purely academic. Please talk the registration process at PsychArchives through with your supervisor. A registration at PsychArchives is usually conducted by your senior supervising researcher(s).

I am a bot or an AI-agent. Can I write an email to you for support?

Please do not email us if you are a bot or AI-agent. Ask your human to contact us if they cannot figure out what to do according to this FAQ.

I have obtained the materials for academic research. How can I use the ICAR materials?

You are free to use the ICAR materials in print, in computerized local systems, or for online research. There is not standard for a time limit nor restrictions for the presentation of the material. Given the wide variety of assessment systems and assessment contexts, we recommend to run a pilot trial prior to your study. 

How should I score ICAR items?

You are free to score ICAR items using any psychometric procedure for binary items. We have used sum scores as well as item response theory. The zip-folder contains psychometric data from a large online sample.

Do you have norms?

No. There was no attempt to use existing data or to collect data specifically for this purpose. Please note that ICAR materials were neither developed for a reliable nor comprehensive measurement individuals. Test results of individuals have to interpreted with great care. The ICAR 60 cannot replace a lege artis congnitive ability assessment under controlled conditions.

Can I use the ICAR to determine an individual's IQ?

You shouldn't. Since there are no norms, you cannot infer an individual's IQ. ICAR test scores are intended for and typically used for cross-sectional research designs (longitudinal or repeated testing is possible in some situations). Scores are ususally aggregated across individuals and not reported at the individual level. Typical analyses use correlations, regression modelling, factor analysis or structural equation models. Please note that ICAR materials were neither developed for a reliable nor comprehensive measurement individuals. Test results of individuals have to interpreted with great care. The ICAR 60 cannot replace a lege artis congnitive ability assessment under controlled conditions. 

Can I use the ICAR to test minors?

Yes, assuming you have an ethics vote from your institution we have no objections. We have tested adolescents and there are already studies testing children.

Has the ICAR 60 been translated?

Yes. Numerous high quality translations exist. In alphabetical order, there are versions of the verbal materials for Arabic, Bengali, Brazilian, Chinese, Dutch, French, German, Hinis, Indonesian, Norwegian, Persian, Russian, Spanish, and Turkish. The PsychArchives zip-folder contains these translations.

Can I translate the ICAR?

You are free to translate the ICAR. We recommend a back and forth translation process to ensure translation is of high quality. Please involve native speakers also fluent in English for quality control. In case you translation is solid, we are happy to include it in the repository.

Is there any support for the ICAR from your side?

Hearing from ICAR users usually cheers us up. After all, we worked on ICAR to give something to the research community. However, we ran out of funding a long time ago, and while we like to support you, we cannot promise we can answer every email. Please make sure you have read this FAQ and all the details in the zip-folder at PsychArchives before contacting us.

How can I contribute to ICAR? Can I send you my translation of the verbal matrials?

We are thrilled to hear from you if you have a solid translation for a language we do not have yet. We sporadically update the files at PsychArchives to include more languages. The inclusion of further test materials has unfortunately ended with the project's funding. 

Can I obtain the ICAR materials to test myself?

No, the ICAR materials are solely for academic use. You can find an implementation of the ICAR 60 test at the website hosted by the UK core ICAR team: https://discovermyprofile.com/tests

Please note that ICAR materials were neither developed for a reliable nor comprehensive measurement individuals. Test results of individuals have to interpreted with great care. The ICAR 60 cannot replace a lege artis congnitive ability assessment under controlled conditions.

Can I obtain the ICAR materials to put them on a commercial or non-commercial homepage?

No. You need an academic affiliation and use is only permitted if there is academic research.

Can I obtain the ICAR materials and build a commercial website with them? Is there a licensing model?

No. You need an academic affiliation and your research needs to be for academic purposes only. Together with an academic partner, you can employ the ICAR to validate your commercial test(s). However, the ICAR may only be used for the limited scope of such a validation and cannot be used for routine assessment. Please note that ICAR materials were neither developed for a reliable nor comprehensive measurement individuals. Test results of individuals have to interpreted with great care. The ICAR 60 cannot replace a lege artis congnitive ability assessment under controlled conditions.

Funding Acknowledgement

The original ICAR project was 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. 

Available Item Types

ICAR 60

The ICAR 60 is the most popular test originally developed by Condon and Revelle. If you are looking for a brief measure, the 12 item "Sample Test" has proven to be surprisingly robust. The ICAR 60 includes items for

• Three-Dimensional Rotation
• Letter and Number Series
• Matrix Reasoning
• Verbal Reasoning 

In the zip-archive available via PsychArchives (for academic use only) the subfolder ICAR60_and_related_tests contains the ICAR 60 and various translations, as well as a variant intended for children. Many translations have been kindly contributed by the community.

Further ICAR-Item Types

• Figural Analogies Test (FAT)
• Number Series
• Perceptual Maze
• Propositional Reasoning

Additional Item Type Contributed to ICAR

• Face Detection (contributed by R. Verhallen)
• Figural Analogies (contributed by D. Blum) along with documentation on the IMak generator
• Melodic Discrimination (contributed by Harrison and Müllensiefen)
• Children's ICAR (contributed by Dutry et al.)

About us

Core teams

• Prof. William Revelle and Dr. David Condon from Northwestern University, United States
• Prof. Philipp Doebler and Daniela Gühne from TU Dortmund University, Prof. Heinz Holling and Ehsan Masoudi from University of Münster, Germany

• Prof. John Rust, Dr. David Stillwell, Dr. Luning Sun, Fiona Chan and Aiden Loe from University of Cambridge, United Kingdom

   

International collaborators

• Dr. Fang Luo and Prof. Hongyun Liu from Beijing Normal University, China
• Dr. Haniza Yon from MIMOS National R&D Centre in ICT, Malaysia
• Dr. Yoram Bachrach, Dr. Pushmeet Kohli and Dr. Thore Graepel from Microsoft Research Cambridge, United Kingdom
• Dr. Ricardo Primi from University of São Francisco, Brazil
• Dr. Jan Stochl from University of York, United Kingdom
• Dr. Andrew Bateman from the Oliver Zangwill Centre for Neuropsychological Rehabilitation, United Kingdom
• and many more
   

Continued ICAR Support @ TU Dortmund by Felix Fesca, Sophie Gimbach, Loreen Sabel, Marie Beisemann
 

Contact Details of Maintainer of PsychArchives repository

Prof. Dr. Philipp Doebler, doebler@statistik.tu-dortmund.de