Is memory the same as IQ?

Memory and IQ are correlated but distinct. Working memory — the active manipulation of information over short timescales — is one of the four CHC index scores reported by the WAIS-IV and correlates with general intelligence at approximately r = 0.5 to 0.7. Long-term memory (episodic and semantic) correlates with IQ more weakly. Memory ability can be impaired in isolation by neurological events (stroke, traumatic brain injury, dementia) without significant impact on other cognitive abilities, and conversely high IQ does not protect against memory disorders. The CHC framework treats memory as a broad ability separable from g, with its own subtest profile and clinical significance.

This question comes up frequently from users of free online IQ tests and from people considering whether to pursue a clinical evaluation. The full answer depends on context — what the score will be used for, how recently the test was administered, and what other information is available. The brief answer above captures the broad consensus from the published research literature; the linked deep-dive articles cover the underlying evidence in more detail.

Related considerations include the standard error of measurement on the relevant test, the population the test was normed against, and the specific cognitive abilities the test samples. A score is much more informative when interpreted alongside these contextual variables than when reported as a bare number.

If this answer raises further questions, see the related FAQ entries listed in the sidebar and the longer-form articles on the same topic in the article library. The site is designed to provide layered depth: the FAQ entries offer concise answers, the deep-dive articles offer the underlying research, and the score-interpretation pages tie the abstract concepts to specific result bands.