ICAR — International Cognitive Ability Resource
Open-source cognitive reasoning assessment developed by Condon & Revelle (2014). Free, research-grade, and CHC-aligned.
Take the free ICAR →Origins
Developed by David Condon and William Revelle at Northwestern University (2014). Published as an open-access alternative to expensive proprietary cognitive tests (WAIS, Stanford-Binet). Increasingly used in research and career assessment.
What it measures
Fluid reasoning (Gf), verbal comprehension (Gc), spatial ability (Gv). Maps onto the Cattell-Horn-Carroll (CHC) model — the dominant framework in modern cognitive psychology.
Why cognitive ability matters for careers
General cognitive ability has the highest single-predictor validity for job performance across nearly every occupation (Schmidt & Hunter 1998; r ≈ 0.51). More specialised abilities (Gf for STEM, Gc for verbal, Gv for engineering) sharpen the career-fit signal.
Frequently asked questions
Is ICAR equivalent to IQ?
It measures constructs closely related to what IQ tests measure, but it's not a formal IQ test. ICAR reports domain scores (Gf, Gc, Gv) not a single g factor.