Does Music Training Increase IQ?

Few claims in popular science have been as durable as the idea that music makes you smarter. The 1990s “Mozart Effect” sent pregnant women rushing to buy classical-music CDs; the state of Georgia distributed one to every newborn; entire industries built themselves on the promise that the right notes would build the right brain. Three decades later, with thousands of studies and several rigorous meta-analyses now on the table, the headline finding is uncomfortably tidy: when researchers compare music training to active control activities (drama, art, sports) and randomize the assignment, the cognitive benefits collapse to roughly zero. The most rigorous evidence — Sala and Gobet’s 2020 multilevel meta-analysis of 54 studies and 6,984 participants, published in Memory & Cognition — found a near-zero overall effect (g ≈ 0.06) once design-quality controls were applied. This does not mean music education is worthless. It means the IQ argument for it has failed, and the case for music has to be made on different grounds.

What was the Mozart Effect, and why did it die?

In 1993, Frances Rauscher, Gordon Shaw, and Catherine Ky published a brief paper in Nature reporting that college students who listened to ten minutes of Mozart’s Sonata for Two Pianos in D Major (K. 448) subsequently performed better on a spatial-reasoning task than students who sat in silence or listened to relaxation tapes. The effect was modest, equivalent to about 8–9 IQ points on the specific task, and lasted only about 10–15 minutes. The original authors never claimed it raised general intelligence, never claimed it worked in children, and never claimed it was anything other than a transient bump on a narrow spatial test.

What followed was a textbook case of how popular science can detach from research. “Ten minutes of improved spatial reasoning in college students” became “Mozart makes babies smarter.” Georgia’s governor distributed a classical CD to every newborn. Florida passed a law requiring state-funded childcare to play classical music daily. The Baby Mozart and Baby Einstein product lines became multi-million-dollar businesses on the strength of a finding their authors never made.

The empirical fate of the Mozart effect was settled by Pietschnig, Voracek, and Formann’s 2010 meta-analysis in Intelligence. Aggregating 40 studies, the authors found only a tiny residual effect (d = 0.15), and the residual was fully explained by general arousal and mood enhancement rather than anything music-specific. Listening to a Stephen King audiobook or other stimulating but non-musical content produced equivalent effects in control conditions. Listening to Mozart, in other words, is no different from any other engaging auditory stimulation. The Mozart effect, as a scientific claim about music’s specific power, is dead.

The more interesting question — does actively learning to play music enhance cognition? — is what the next two decades of research turned to.

Schellenberg 2004: the landmark study, in context

The most cited evidence for music training raising IQ is E. Glenn Schellenberg’s 2004 paper in Psychological Science, conducted at the University of Toronto. Schellenberg randomized 144 six-year-olds to one of four 36-week conditions: keyboard lessons, voice lessons, drama lessons, or no lessons (waitlist control). All children were administered a full WISC-III IQ battery before and after the intervention.

The finding: the two music groups (combined) showed an IQ gain of roughly 7 points, compared to about 4–5 points in the control group — a music-specific advantage of approximately 2.7 IQ points (the figure popularly cited as “3.5 points” rounds the comparison differently). The gain appeared across most WISC subtests rather than being limited to a single domain. Drama lessons produced no IQ advantage but did produce social-behavior gains, suggesting the cognitive effect was specific to music among extracurricular options tested.

Schellenberg’s study became the empirical anchor for two decades of “music raises IQ” claims. But several caveats apply that have not always traveled with the headline finding:

• The 2.7-point advantage is within the standard error of measurement of most IQ tests.
• The sample (n = 144) was small enough that confidence intervals were wide.
• No follow-up testing was conducted to determine whether the gain persisted past the immediate post-intervention assessment.
• The study has not been replicated at comparable scale and rigor in the twenty years since.
• A 2013 Harvard study by Mehr et al. — the closest direct replication attempt — found no IQ benefit of music classes over a comparable visual arts class.

Schellenberg’s own subsequent work (in 2006 and 2011) walked back the strong causal interpretation, increasingly framing the finding as suggestive rather than definitive. By the late 2010s, his published view was that the music-IQ relationship is real but largely explained by selection effects — a position much closer to the meta-analytic consensus than to the popular reading of his 2004 paper.

The meta-analytic verdict: Sala and Gobet 2017 and 2020

The most rigorous synthesis of the music-training-and-cognition literature is the pair of meta-analyses by Giovanni Sala and Fernand Gobet. The 2017 paper in Educational Research Review aggregated 38 studies (118 effect sizes, N = 3,085) on music skill transfer in children and young adolescents. The 2020 update in Memory & Cognition added more studies and adopted a multilevel framework, reaching 54 studies, 254 effect sizes, and 6,984 participants — the most comprehensive synthesis available.

The 2020 results are the cleanest answer the field can give to the question:

• Overall pooled effect: g = 0.184 (SE = 0.041). Modest positive, on the surface.
• With active control groups: g = 0.056. The effect collapses by 70% when music training is compared to other structured enrichment activities rather than to no intervention.
• In sensitivity analyses excluding lower-quality designs: g drops to -0.021. Statistically and practically indistinguishable from zero.
• No moderation by outcome type: verbal abilities, nonverbal abilities, memory, and processing speed all showed the same near-zero pattern under proper controls (all p ≥ 0.362).
• No moderation by age or training duration: longer training did not produce larger effects, and effects did not vary across age groups.

The authors’ conclusion is direct: “studies using active controls or implementing random assignment report homogeneous null or near-zero effects.” Translation: the apparent benefits of music training, when they appear in individual studies, come from comparing children who got music to children who got nothing. Comparing children who got music to children who got equivalent structured activities (drama, sport, art) erases the difference.

Patrick Cooper’s 2020 meta-analysis in International Journal of Music Education reached complementary conclusions, with somewhat smaller positive effects on verbal abilities and near-null effects on nonverbal abilities. Across the three independent meta-analyses, the consensus is unmistakable: the cognitive benefits attributed to music training in popular discourse are largely methodological artifacts of comparing music students to controls who received no enrichment at all.

Why active controls matter so much

The collapse of the music-training effect under active controls is the central methodological point, and it deserves more attention than it usually gets.

A study comparing children in music lessons to children doing nothing extra is testing two things at once: the specific effect of music, plus the general effect of receiving any structured cognitive enrichment. Music involves a teacher, a schedule, a discipline, a sustained attentional demand, a community of practice, and an accumulating set of skills — and so does drama, chess, second-language learning, organized sport, or art. When the comparison group does nothing extra, the music group will appear to gain on cognitive measures. But the gain is not a music-specific effect; it is the effect of structured enrichment, and music has no claim to it that drama or sport do not also have.

Active controls strip out the structured-enrichment effect and isolate the music-specific contribution. The Sala and Gobet meta-analyses show that the music-specific contribution, isolated this way, is essentially zero. The implication is not that structured enrichment doesn’t matter — it does — but that music has no special claim to it.

Why do musicians score higher on cognitive tests, then?

Cross-sectional comparisons consistently find that musicians outperform non-musicians on a range of cognitive measures. If music training doesn’t cause this, what does?

• Self-selection. Children who begin and persist in music training tend to come from higher-IQ families, more educated parents, and more cognitively stimulating home environments. The selection happens before the lessons start and intensifies as the children who don’t enjoy music drop out. By the time we observe a stable population of “musicians,” the population has been selected at multiple stages on cognitive correlates.
• Socioeconomic confounds. Private music instruction is expensive. Families who can afford instruments, lessons, and the time to support practice typically also provide tutoring, books, travel, and other cognitive enrichments. Disentangling music from the broader bundle is difficult in observational research and is exactly what RCTs are supposed to do.
• Personality and motivation. Conscientiousness, openness to experience, and intrinsic motivation predict both music engagement and academic success. The same dispositional factors that keep a child practicing scales also keep them on top of homework.
• Practice effects on specific subtests. Sustained music practice may improve performance on certain WAIS or WISC subtests (auditory working memory, processing-speed-related scoring) without reflecting any change in general intelligence — a domain-specific skill effect that inflates measured IQ without changing the underlying construct.

These selection and confound effects do not require music training to have any cognitive transfer at all. They predict the cross-sectional musician-advantage even under the assumption that music training has zero causal effect on cognition.

What music training does do (that doesn’t show up on IQ tests)

The meta-analyses show no transfer to general cognition. They do not show that music training has no effects at all — and the distinction matters.

Auditory discrimination. Musicians demonstrably show enhanced ability to detect subtle differences in pitch, timing, and timbre. Brainstem encoding of speech sounds is sharper in musically trained individuals. These are real, replicable findings — they just don’t translate to general-intelligence gains, because general intelligence is not bottlenecked by auditory discrimination in most people.

Phonological awareness. Music training is associated with stronger phonological skills, the ability to recognize and manipulate speech sounds. This has been linked to reading-decoding advantages in early literacy, though the long-term significance for reading achievement is debated.

Neural changes. Brain imaging studies consistently find structural and functional differences in the auditory cortex, corpus callosum, and cerebellum of musicians. These are real neuroplastic adaptations to sustained training. They show that the brain responds to music practice — they do not show that music practice raises IQ.

Social and emotional development. Group music-making (choirs, ensembles, bands) produces measurable improvements in cooperation, social bonding, and emotional regulation. These benefits are real and practically significant; they are also not the kind of thing IQ tests measure.

Executive function components. Some evidence supports modest gains in working memory and inhibitory control with sustained instrumental training, though the meta-analytic effects are small and inconsistent. Executive function research suggests transfer effects are generally domain-specific and unlikely to broadcast to broad cognitive ability.

Should children still learn music?

Yes — but for the right reasons. The case for music education does not need to rest on cognitive transfer that the evidence does not support. Music is a uniquely human form of expression, communication, discipline, and cultural participation. It develops domain-specific skills (auditory perception, motor coordination, ensemble cooperation) that have intrinsic value. It connects children to traditions and communities. It produces moments of joy, frustration, and achievement that shape character in ways no IQ test can detect.

What the evidence does not support is the inverse: choosing music over other enrichment activities because it raises intelligence. Sports, theater, art, coding, second-language learning, and organized debate produce comparable structured-enrichment effects on cognition, and the cognitive case for music over these alternatives is empirically thin. Children who hate practicing violin and would rather play soccer are not making a cognitive mistake by choosing soccer; the meta-analytic evidence is that they would do equally well cognitively either way, and the engagement and motivation of doing what they enjoy will likely matter more than the specific activity.

For parents and educators, the practical implications are unglamorous. Choose enrichment activities your child will actually engage with. Don’t pay for music lessons your child resents in the hope that the IQ payoff will materialize — the evidence says it won’t. Use music education’s actual virtues — beauty, expression, discipline, community — to make the case for it. They are sufficient.

The bottom line

The Mozart Effect was a transient task-specific bump misread as a child-development principle. Music training, more carefully studied, produces real changes in auditory processing, neural architecture, and domain-specific skill — but does not transfer to general intelligence in any way that survives proper experimental controls. Three independent meta-analyses (Sala and Gobet 2017, Sala and Gobet 2020, Cooper 2020) converge on this conclusion. The cross-sectional musician-superiority finding is robust and is fully explained by self-selection and confounds, without requiring any causal contribution from music training. The case for music education stands on its own merits — artistic, cultural, social — and does not need the IQ argument that the evidence has not supported. The broader question of whether IQ can be raised by training has the same honest answer: the meta-analytic record is consistent across cognitive-training domains, and music is not the exception.

Frequently Asked Questions

Does listening to Mozart make babies smarter?

No. The original Rauscher, Shaw, and Ky 1993 finding was a 10–15 minute spatial-reasoning bump in college students, never replicated reliably for IQ effects. Pietschnig, Voracek, and Formann’s 2010 meta-analysis of 40 studies found the residual effect was tiny and fully explained by general arousal and mood — not music-specific. There is no evidence that passive music exposure raises infant or child cognition.

Did Schellenberg’s 2004 study prove music lessons raise IQ?

It found a roughly 2.7-point IQ advantage in 6-year-olds receiving 36 weeks of music instruction over a no-lesson control. The effect was within the measurement error of the test, the sample was small (n = 144), no follow-up was published, and the closest direct replication (Mehr et al. 2013) found no advantage over a visual-arts comparison. Schellenberg himself has since softened the causal interpretation. The 2004 study contributes one piece of evidence to a literature that, in aggregate, has not supported a robust music-IQ effect.

What does the most recent meta-analysis say?

Sala and Gobet’s 2020 multilevel meta-analysis in Memory & Cognition aggregated 54 studies and 6,984 participants. The overall effect was modest (g = 0.184), but with active control groups it dropped to g = 0.056, and in sensitivity analyses excluding lower-quality designs it became indistinguishable from zero (g = -0.021). No moderation was found by outcome type, age, or training duration. The most rigorous current evidence is that music training produces near-zero cognitive transfer.

Why do musicians score higher on cognitive tests?

Selection effects and confounds account for it. Children who pursue and persist in music training come disproportionately from higher-IQ, higher-SES, more educated families with more cognitive enrichment overall. The same conscientiousness and motivation that supports music practice also supports academic engagement. None of this requires music training to have any causal effect on cognition.

Does music training have any cognitive benefits at all?

Yes — for narrow auditory and music-specific skills. Auditory discrimination, phonological awareness, brainstem encoding of speech sounds, and certain neural-architectural features are reliably enhanced by music training. These are real and sometimes practically useful (especially for early literacy). They do not transfer to broad cognitive ability or IQ.

Is it worth paying for music lessons?

That depends on what you are paying for. If the goal is a child who can play music, develop discipline, and participate in a meaningful artistic tradition, lessons are excellent value. If the goal is to raise the child’s IQ or general academic ability, the meta-analytic evidence is that other activities (sports, drama, art, coding, debate) likely produce comparable cognitive effects and may better match the child’s interests. Choose for engagement, not for the cognitive-transfer myth.

What if my child loves music?

Support it enthusiastically. Music engages a child who loves music in ways that no other activity will. The cognitive case for or against music training is largely irrelevant when intrinsic motivation is high — engaged practice produces all the structured-enrichment benefits and the music-specific skill development, and the experience is its own reward.