Does Music Training Increase IQ? What the Research Actually Shows

Few claims in popular science are as persistent as the idea that music makes you smarter. From the “Mozart Effect” craze of the 1990s — which sent pregnant women rushing to buy classical CDs — to today’s parents enrolling toddlers in Suzuki violin, the belief that music training enhances general intelligence has deep cultural roots. But what does the research actually show? The answer is nuanced, sometimes contradictory, and more interesting than the headlines suggest.

What was the Mozart Effect and why did it matter?

In 1993, Rauscher, Shaw, and Ky published a brief paper in Nature reporting that college students who listened to 10 minutes of Mozart’s Sonata for Two Pianos in D Major (K. 448) subsequently performed better on spatial reasoning tasks. The effect was modest (equivalent to 8–9 IQ points on the specific task) and lasted only 10–15 minutes.

What happened next is a cautionary tale in science communication. The media transformed “10 minutes of improved spatial reasoning in college students” into “Mozart makes babies smarter.” Georgia’s governor provided a classical music CD to every newborn. Florida passed a law requiring state-funded childcare centers to play classical music daily. A multi-million-dollar industry of “Baby Mozart” and “Baby Einstein” products emerged.

The original finding failed to replicate consistently. A meta-analysis by Pietschnig, Voracek, and Formann (2010) examined 40 studies and found only a tiny residual effect (d = 0.15) that could be explained by arousal and mood enhancement rather than any music-specific cognitive mechanism — listening to any enjoyable stimulation (a Stephen King audiobook, in one control condition) produced equivalent benefits.

The Mozart Effect is essentially dead as a scientific claim. But the broader question — does actively learning music enhance cognition? — is more complex.

What did Schellenberg’s landmark study find?

The most influential study on music training and IQ was conducted by E. Glenn Schellenberg (2004) at the University of Toronto. He randomly assigned 144 six-year-olds to one of four conditions for 36 weeks: keyboard lessons, voice lessons, drama lessons, or no lessons (control). All children were tested on a full IQ battery before and after the intervention.

Results: The two music groups showed a mean IQ increase of 3.5 points more than the control group. The drama group showed no IQ advantage but did show improved social behavior. The effect was small but statistically significant and appeared across multiple IQ subtests rather than being limited to a single domain.

This study is widely cited as evidence that music training causes cognitive enhancement. However, several caveats apply:

• The 3.5-point advantage is within the standard error of measurement of most IQ tests
• No follow-up was conducted to determine whether effects persisted
• The drama group received equal hours of instruction — yet showed no IQ benefit — suggesting the effect may be specific to music rather than to structured extracurricular activity generally
• The study has not been fully replicated at the same scale

What cognitive mechanisms might explain music’s effects?

Several plausible pathways have been proposed:

Auditory processing enhancement: Music training demonstrably sharpens auditory discrimination — the ability to detect subtle differences in pitch, timing, and timbre. Kraus and Chandrasekaran (2010) showed that musicians have enhanced brainstem encoding of speech sounds. Since language processing depends on auditory discrimination, this could cascade to verbal intelligence and reading ability.

Executive function training: Playing an instrument requires simultaneously reading notation, coordinating fine motor movements, monitoring pitch and rhythm, adjusting in real-time, and maintaining the overall musical structure — a multi-tasking demand that exercises executive function, working memory, and attentional control.

Structured practice and self-regulation: Music lessons involve goal-setting, delayed gratification, sustained attention, error monitoring, and progressive skill building — the same self-regulatory skills that predict academic success. The cognitive benefit may come not from music per se but from the discipline of structured practice.

Motivation and engagement: Children who enjoy music lessons are more engaged, more attentive, and more willing to sustain effortful practice — qualities that support cognitive development independently of the specific content.

The challenge is that these mechanisms are not unique to music. Bilingualism, chess, martial arts, and other demanding activities also exercise executive function and require sustained practice. The question is whether music provides cognitive benefits above and beyond other enrichment activities.

What do the meta-analyses reveal?

Two comprehensive meta-analyses by Sala and Gobet have substantially tempered the optimism:

The critical finding: the apparent cognitive benefits of music training are largely methodological artifacts. Studies without active control groups (comparing music students to children who receive nothing) show positive effects. Studies with active controls (comparing music to drama, art, or sports) show effects near zero. This pattern strongly suggests that the benefits come from receiving structured enrichment rather than from music specifically.

Why do musicians score higher on IQ tests if music doesn’t cause the difference?

Cross-sectional studies consistently find that musicians outperform non-musicians on various cognitive measures. But correlation is not causation, and several factors explain the association without invoking a causal effect of music on cognition:

• Self-selection: Children who begin and persist in music training tend to have higher cognitive ability, more educated parents, and more stimulating home environments to begin with. Children who learn faster are more likely to be enrolled in music lessons and more likely to continue
• Socioeconomic confounds: Music lessons are expensive. Families who can afford private instruction tend to provide many other cognitive enrichment opportunities simultaneously
• Personality factors: Openness to experience, conscientiousness, and intrinsic motivation — all associated with higher cognitive ability — also predict engagement with music training
• Practice effects: The hours spent in structured practice build domain-specific skills that may enhance performance on certain IQ subtests (particularly verbal and auditory-processing measures) without reflecting a genuine increase in general intelligence

Does music training benefit specific abilities even if it doesn’t raise IQ?

Yes — and this is an important distinction. Even if music training doesn’t enhance general intelligence, it may confer domain-specific benefits that have practical value:

Language and reading: The connection between music training and phonological awareness (the ability to recognize and manipulate speech sounds) is well-established. Patel’s OPERA hypothesis (2011) proposes that music training enhances auditory processing through overlap with speech processing networks, precision demands, emotional engagement, repetition, and attention. Multiple studies find that musically trained children show enhanced reading skills, particularly in phonological decoding.

Spatial-temporal reasoning: Some evidence supports enhanced spatial abilities in musicians, though the effect is smaller and less consistent than for verbal-auditory skills.

Social-emotional development: Group music-making enhances cooperation, empathy, and social bonding — benefits that are well-documented and practically significant, even if they don’t appear on an IQ test.

Neural efficiency: Musicians show more efficient neural processing of auditory information, better corpus callosum connectivity (linking the hemispheres), and enhanced cerebellar function — changes that represent genuine neuroplastic adaptation to musical training.

What should parents and educators take away?

The evidence supports several practical conclusions:

• Music training is valuable — but not because it raises IQ. The intrinsic benefits of musical skill, the joy of artistic expression, the discipline of practice, and the social experience of ensemble playing are more than sufficient reasons to support music education
• Don’t choose music over other enrichment solely for cognitive benefits. Sports, drama, art, coding, and other structured activities likely provide comparable cognitive stimulation
• Start early if your child shows interest. The neuroplastic benefits of music training are strongest during childhood, when the brain is most adaptable
• Don’t force reluctant children. The potential cognitive benefits of music training depend on engagement and sustained practice. A child who hates practicing violin is unlikely to reap cognitive benefits and may develop negative associations with learning
• Be skeptical of “music makes you smarter” marketing. Products claiming to boost intelligence through passive music listening have no scientific support

The bottom line

The relationship between music training and intelligence is real but misunderstood. Musicians are, on average, smarter — but music training probably doesn’t make them smarter. The association reflects self-selection, socioeconomic advantages, and the general benefits of structured enrichment rather than a specific causal effect of music on general intelligence. This doesn’t diminish the value of music education — it simply reframes it. Music is worth pursuing for what it is: a uniquely human form of expression, communication, and beauty. It doesn’t need to justify itself by raising IQ scores.