IQ tests validly measure general cognitive ability in adults.

Is it true that IQ tests validly measure general cognitive ability in adults?

Partly. Evidence on both sides is partial: one 1975 abstract rejects claims that intelligence tests validly measure ability, and a brief screener (GAMA) misestimates IQ in pilots, while other sources report that a gamified g measure and a tablet battery show reliability and validity and that IQ tests converge on a general-intelligence factor. No retrieved item settles the general claim about IQ tests in adults.

Verdict: CONTESTED PARTIAL · 4 sources for, 4 against · Last checked 3 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Malanchini, M., Rimfeld, K., Gidziela, A., Cheesman, R., Allegrini, A., Shakeshaft, N. G., Schofield, K. L., Packer, A. E., Ogden, R., McMillan, A., Ritchie, S., Dale, P. S., Eley, T., Stumm, S. v., & Plomin, R. (2021). Pathfinder: A gamified measure to integrate general cognitive ability into the biological, medical, and behavioural sciences. doi.org. https://doi.org/10.1038/s41380-021-01300-0

Cognitive skill. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Cognitive_skill

Pan, D., Xie, H., Zeng, Y., Zhou, Y., Lin, C., Ma, X., Ren, J., Jiao, Y., Wu, Y., Wei, W., & Xue, G. (2024). The development and validation of a tablet-based assessment battery of general cognitive ability. doi.org. https://doi.org/10.1186/s40359-024-02283-7

Alosco, M. L. & Stern, R. A. (2019). The Oxford Handbook of Adult Cognitive Disorders. play.google.com. https://play.google.com/store/books/details?id=UiCWDwAAQBAJ&source=gbs_api

The Looking Glass for Intelligence Quotient Tests: The Interplay of Motivation, Cognitive Functioning, and Affect - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.3389/fpsyg.2019.02857

Dalton, J. C. (1975). What Do IQ Tests Measure?. eric.ed.gov. https://eric.ed.gov/?id=EJ115882

DaCosta, A., Crane, A., Roccaforte, A., Davies, M., Prewitt, D. S., Webbe, F., & Logalbo, A. (2022). The general ability measure for adults underrepresents true IQ in a high-functioning aviation population. doi.org. https://doi.org/10.1080/23279095.2021.2023155

A, D., A, C., A, R., M, D., D, P., F, W., & A, L. (2020). A-192 The General Ability Measure for Adults Underrepresents True IQ in a High-Functioning Aviation Population. doi.org. https://doi.org/10.1093/arclin/acaa068.192