While some supportive reports have been published, studies with positive results have tended to be associated with any form of music that has energetic and positive emotional qualities. Moreover, the intellectual benefits of enhanced mood and arousal are not restricted to spatial-temporal reasoning, but extend to speed of processing and
creative problem solving. Among children, some studies suggest no effect on IQ or spatial ability, whereas others suggest that the effect can be elicited with energetic popular music that the children enjoy. The weight of subsequent evidence supports either a null effect, or short-term effects related to increases in mood and arousal, with mixed results published after the initial report in
Nature. In 1999 a major challenge was raised to the existence of the Mozart effect by two teams of researchers. In a pair of papers published together under the title "Prelude or Requiem for the 'Mozart Effect'?" Chabris reported a
meta-analysis demonstrating that "any cognitive enhancement is small and does not reflect any change in IQ or reasoning ability in general, but instead derives entirely from performance on one specific type of cognitive task and has a simple neuropsychological explanation", called "enjoyment arousal". For example, he cites a study that found that "listening either to Mozart or to a passage from a
Stephen King story enhanced subjects' performance in paper folding and cutting (one of the tests frequently employed by Rauscher and Shaw) but only for those who enjoyed what they heard". Steele et al. found that "listening to Mozart produced a 3-point increase relative to silence in one experiment and a 4-point decrease in the other experiment". In another study, the effect was replicated with the original Mozart music, but eliminated when the tempo was slowed down and major chords were replaced by minor chords. Despite implementing Rauscher, Shaw, and Ky's (1995) suggestions of three key components that must be present to replicate the Mozart Effect, McCutcheon (2000) still failed to reproduce the Mozart Effect in a study with 36 adults. These conditions were: to ensure a task that taps into spatial components of
mental imagery; a research design that does not include a pretest to avoid ceiling effects; a musical composition that is complex rather than repetitive and simple. Regardless of listening to classical music, jazz or silence, the study did not yield a significant effect on spatial reasoning performance. The Mozart Effect is likely just an artifact of arousal and heightened mood. Arousal is the confounding variable that mediates the relationship between spatial ability and music that defines the Mozart Effect. Popular presentations of the "Mozart effect", including Alex Ross's comment that "listening to Mozart actually makes you smarter" and Zell Miller's "don't you feel smarter" query to the Georgia legislature, almost always tie it to "intelligence." Rauscher, one of the original researchers, has disclaimed this idea. In a 1999 reply to an article challenging the effect, Many scholars in the psychological community now view the claim that playing classical music to children can boost their intelligence to be a "myth."
Emory University psychologist
Scott Lilienfeld ranks Mozart Effect as number six in his book
50 Great Myths of Popular Psychology.
Health benefits Music has been evaluated to see if it has other properties. The April 2001 edition of
Journal of the Royal Society of Medicine assessed the possible health benefits of the music of Mozart. John Jenkins played Sonata K.448 to patients with epilepsy and found a decrease in epileptiform activity. According to the British Epilepsy Organization, research has suggested that apart from Mozart's
K.448 and
Piano Concerto No. 23 (K. 488), only one other piece of music has been found to have a similar effect; a song by the Greek composer
Yanni, entitled "Acroyali/Standing in Motion" (version from
Yanni Live at the Acropolis performed at the Acropolis). In 2023, Sandra Oberleiter and Jakob Pietschnig showed in
Scientific Reports that the existing evidence on the Mozart Effect in epilepsy is not scientifically robust. In an extensive meta-analysis, it was argued that positive findings regarding symptom relief are based on inadequate research designs, selective reporting, and too small sample sizes. Additionally, results cannot be replicated because study data is not available and therefore does not comply with modern research standards. ==Other uses of Mozart's music==