Does Music Make You Smarter? The Mozart Effect and Music Lessons, Tested

"Play Mozart to your unborn baby." "Piano lessons make kids smarter." Claims linking music to intelligence are persistent and recur in ads for educational products and lessons. This article lines up the two famous studies that started it all against the meta-analyses that tested them, and sorts what survived from what did not.

Where the Mozart effect began

It started with a one-page report by Rauscher, Shaw, and Ky (1993, Nature). Thirty-six college students spent 10 minutes under one of three conditions, listening to Mozart's Sonata for Two Pianos (K. 448), listening to a relaxation recording, or sitting in silence, then took spatial reasoning tasks. Scores after Mozart were higher than in the other conditions, a difference equivalent to 8 to 9 IQ points.

But as the paper itself states, the effect lasted only 10 to 15 minutes. And what was measured was a spatial reasoning subtest, not intelligence in general. Even so, the finding spread in the simplified form "Mozart makes you smarter," to the point that in 1998 the state of Georgia announced a plan to give every newborn a classical music CD.

What survived meta-analysis

Dozens of replications followed. Pietschnig, Voracek, and Formann (2010, Intelligence) pooled about 40 studies and roughly 3,000 participants. Three points sum up the result.

• The difference between Mozart and silence was small, and larger in studies from Rauscher's own lab than elsewhere
• Comparing Mozart with other music, there was almost no difference
• There were signs of publication bias

The decisive point was "other music works just as well." Thompson, Schellenberg, and Husain (2001, Psychological Science) showed that a fast, bright Mozart piece improved spatial task scores while a slow, somber Albinoni piece did not, and that the difference was explained by arousal and mood. In short, any stimulus you enjoy lifts your mood and slightly improves the task right after; it is a general phenomenon, not something specific to Mozart.

What if you learn rather than listen?

Even with the listening effect gone, the question remains whether lessons are different. Schellenberg (2004, Psychological Science) addressed it head on. He randomly assigned 144 six-year-olds to four groups, 36 weeks of keyboard lessons, voice lessons, or drama lessons, or no lessons, and measured IQ before and after.

The two music groups gained an average of 7.0 IQ points; the drama and no-lesson groups gained 4.3 (all groups gain because of a year's growth and practice effects). The 2.7-point difference was statistically significant, but the author himself called it relatively small. The drama group improved in social skills; the music groups did not.

This was a high-quality design with random assignment and an active control (drama). The question was whether the result would replicate.

A meta-analysis of 54 studies

Sala and Gobet (2020, Memory & Cognition) pooled 54 studies of music training in children with 6,984 participants. The outcomes were cognitive abilities (intelligence, memory, spatial ability, and so on) and academic achievement.

The overall effect was g ≈ 0.06, effectively zero. Restricting to well-designed studies meeting both conditions, random assignment and an active control group, no effect was detected. Studies reporting effects tended to use a do-nothing control or non-random assignment.

This is the general rule of training research. Practicing an instrument reliably improves playing skill and nearby abilities such as pitch and rhythm discrimination (near transfer). Transfer to intelligence in general (far transfer) is limited. The same pattern appears in brain-training hobbies, bilingualism and executive function, and Can you raise your IQ?.

Why the correlation appears

Still, many surveys find that children who play music have higher IQs. If interventions show no effect but the correlation persists, the explanation lies in selection.

Children who stick with an instrument tend to come from families with higher income and parental education, to have the self-control to keep practicing, and to be higher in openness to new experience. Each of these also correlates with IQ. So rather than "music raised their IQ," most of the correlation is explained the other way: children with the conditions for higher IQ are more likely to keep up music. It is the same structure discussed in IQ, genes, and environment.

Reasons to learn music anyway

To sum up, playing music to a child or enrolling them in lessons "to raise IQ" rests on weak grounds. On the other hand, being able to play an instrument, listening to music with understanding, performing in front of people at a recital, and the habit of steady practice are valuable regardless of the intelligence debate. There is no need to look for the payoff in IQ.

If wanting to know a child's abilities is the motivation behind this, the article on IQ tests for children covers the limits of measurement by age and when each kind of test fits.

Measure where your spatial reasoning stands now

What the Mozart-effect studies measured was spatial reasoning. You can check how your own spatial reasoning compares with your other domains through domain scores. BrainRank's free IQ test scores 20 questions (about 10 minutes) across spatial reasoning, pattern recognition, logical reasoning, and classification using item response theory (IRT), and returns your profile by domain. How the domains relate is summarized in our skill correlation data. Results are estimates for entertainment and self-understanding, not a medical or diagnostic assessment.