No MBTI type reliably has the highest IQ. Intelligence spreads across all personality types, with only modest links to traits like Openness.
How IQ and personality are measured
IQ tests such as the WAIS or Stanford‑Binet assess maximal cognitive performance: memory, reasoning, and processing speed. Personality inventories, whether the Big Five or MBTI, capture typical patterns of thought and behavior over time. Because they target different constructs, a direct comparison is inherently limited.
Openness and the search for a link
Research on the Big Five shows the strongest, though still small, correlation between Openness to Experience and general mental ability (r≈0.20–0.25). Openness reflects curiosity, imagination, and a willingness to engage with abstract concepts—factors that can foster intellectual growth.
What MBTI says about Openness
The MBTI’s Sensing‑Intuition axis maps most closely onto Openness. Studies of gifted populations report a higher proportion of Intuitive (N) types, but the effect size is modest and does not translate into a definitive IQ ranking.
Why online “IQ by type” charts are misleading
Internet rankings often rely on self‑selected samples, lack peer‑reviewed sources, and ignore the large within‑type variation. A single type can contain individuals with IQs from the average range to the gifted range, making any average comparison unreliable.
Other personality traits and test performance
Introversion and Thinking traits sometimes correlate slightly with academic test scores, but this is largely due to study habits and test‑taking preferences rather than inherent intelligence. Extraverts excel in social and emotional domains that standard IQ tests rarely capture.
Bottom line
IQ is a complex construct that does not map cleanly onto any MBTI type. While certain traits like Openness may be associated with higher cognitive scores, the variation within each type far exceeds the differences between types. Therefore, no single personality type can be said to have the highest IQ.