Welcome to ICAR!

The ICAR package has been developed to include functions for the generation of cognitive ability item types. The ICAR package is intended to facilitate the distribution of cognitive ability measures which have been described in several locations as the International Cognitive Ability Resource.

Track development at http://github.com/frenchja/icar/, log issues or contribute ideas at https://github.com/frenchja/icar/issues.

Why Use ICAR?

ICAR is open-source software! As such, in addition to the Personality, Motivation, & Cognition Lab at Northwestern University, it attracts bright, motivated collaborators from across the globe.

Second, obtaining quality assessments shouldn't be an expensive endeavor. Unlike other measures of cognitive ability, ICAR is entirely free - just respect the open-source license below.

Last, your feedback and ideas help shape ICAR. If you have critiques about existing functions, or ideas for new items and algorithms, you can engage us in a dialog using the issues tracker.

Package Details

based on R, an open-source statistics language
freely distributed under the GPLv3 license
developed and tested by the Personality, Motivation, and Cognition Lab at Northwestern University and collaborators
used by the Personality Project's "Big Five" Assessment

Install

To install the development version of icar, it's easiest to use the Hadley Wickam's devtools package. To install or update, run:

# install.packages('devtools')
library(devtools)
install_github(repo = 'icar', username = 'frenchja')
library(icar)

References

French, J. A., Condon, D. M., & Revelle, W. (2013). icar: International Cognitive Ability Resource. R package version 0.1. http://github.com/frenchja/icar/

Condon, D. M. & Revelle, W. (in manuscript). The International Cognitive Ability Resource: Development and initial validation of a public-domain measure.

Condon, D. M., French, J. A., Brown, A., & Revelle, W. (June, 2013). Development and Validation of the International Cognitive Ability Resource. Association for Research in Personality Conference. Charlotte, N

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

In short, this package is free to use as long as you 1) cite us, 2) share any modified source code, and 3) freely release any modified products.