EQ vs. IQ: What the Evidence Actually Shows

Side by side

How much do EQ and IQ overlap?

For ability EI, the overlap is real. Mayer, Salovey and Caruso report that the MSCEIT and its predecessor correlate about .35 with verbal intelligence and less with perceptual and organizational IQ, with most of the verbal overlap coming from the understanding-emotions branch (Mayer, Salovey, and Caruso, 2008). A structural study of 688 students went further: ability EI fit as a broad factor of cognitive ability that loaded on general intelligence at λ = .80, on a level with factors such as fluid intelligence (MacCann and colleagues, 2014).

So the most defensible scientific reading is not “EQ versus IQ” at all. Ability EI behaves like one branch of intelligence: the part that handles emotional content. Trait EI is a different animal. Its developers place it inside personality rather than intelligence (Petrides and Furnham, 2001), which is why a self-report EQ quiz can come out high for someone who would score modestly on an ability test.

Not everyone accepts EI as an intelligence. Edwin Locke argued that the concept is not a form of intelligence and is defined so broadly it loses a clear meaning (Locke, 2005). The ability model was in part a response to critiques like this.

Does EQ predict anything IQ does not?

This is the question that matters, and statisticians call it incremental validity: once you already know someone’s IQ and personality, does adding an EI score improve your prediction? For job performance, the answer is “a little.” A large meta-analysis found corrected correlations between EI and job performance of 0.24 to 0.30 across measurement approaches, with self-report and mixed measures adding the most beyond cognitive ability and the Big Five (O’Boyle and colleagues, 2011).

A later meta-analysis looked more closely at the mixed measures. Their correlation with supervisor-rated performance was ρ = .29, but it fell to essentially zero (β = -.02) once ability EI, self-efficacy, self-rated performance, personality and general mental ability were controlled (Joseph and colleagues, 2015). In other words, much of what mixed EQ tests predict is predicted by things we already measure.

Context matters too. For ability EI, the link with job performance was positive in jobs with heavy emotional labor, such as customer service, and negative in jobs with little of it (Joseph and Newman, 2010). EQ is not a universal booster. It helps most where handling feelings is part of the job.

Where “EQ beats IQ” came from

The claim traces to popular writing. Goleman’s 1995 bestseller said EI “can be as powerful, and at times more powerful, than IQ,” and a later book attributed nearly 90% of the difference between star and average performers to EI. Mayer and colleagues, who introduced the scientific concept, say their own work never made such claims and that they critiqued them (Mayer, Salovey, and Caruso, 2008). For perspective, a correlation of .30, the top of the job-performance range above, corresponds to about 9 percent of the variance in performance in a statistical sense. That is useful, and nowhere near 90.

People judge their IQ better than their EQ

One finding gets less attention than it deserves. When Brackett and colleagues asked people to estimate their own abilities, estimates of verbal intelligence correlated r = .43 with actual verbal SAT scores, while estimates of MSCEIT performance were essentially unrelated to actual scores (Brackett and colleagues, 2006). If you are sure you are “more of an EQ person than an IQ person,” that certainty is weak evidence. Your sense of your emotional skill is the less reliable of the two.

When being right and being heard collide

The everyday version of the EQ-versus-IQ question is usually a meeting where someone is correct and still loses the room. Being correct is a reasoning task. Getting a group to act on it adds emotional tasks: noticing that the project lead is embarrassed, understanding that public correction makes people defend their plan, and choosing a channel that lets them change course without losing face. A message such as “I ran the numbers again and got a different answer on the margin. Can we look at it together before Thursday?” keeps the analysis and drops the audience. Neither skill substitutes for the other, which is the practical reason not to rank them.

What to take from all this

IQ and ability EI are related, both matter, and neither is destiny. The best evidence supports a modest, role-dependent contribution of EI beyond IQ, not a reversal of priorities. For more on how the tests differ, read how emotional intelligence is measured; for the workplace evidence, see emotional intelligence at work; and for a short answer, see is EQ more important than IQ. EQTiger is not an IQ test and its descriptive scores cannot be compared with IQ scores.