Does classical music enhance intelligence in children more than other genres? This question is based on a previous question I have written on Parenting SE: Does playing classical music for infants and young children make them smarter?

Question:


  Are these claims actually saying classical music is more intelligence enhancing than other forms of music? If so, is that true?


As a composer, I would find this interesting because I think certainly there are many different kinds of music and it seems very surprising to single out one genre as requiring more intelligence. 

For instance, suppose you say Mozart is more sophisticated then the Boss (Bruce Springsteen) and therefore more intelligence promoting.  By that logic then, Schoenberg's music should be better for children than Mozart since Schoenberg is certainly more complex than Mozart (e.g. chromatic vs diatonic scales; polymeter vs single meter). But I would never play Schoenberg for my child instead of Mozart because I find Schoenberg unnatural to listen to because it is so weird and complex. The point is I think simply saying classical music is more sophisticated or superior isn't a very meaningful distinction and greater clarification should be given about why classical music in particular enhances learning (if in fact that has any basis). 

Another way of saying this is, why doesn't music in general enhance it then?  Why classical music in particular?
A great overview of this topic is available in Chapter 6 of the book The Invisible Gorilla by Chabris &amp; Simons. My answer is based, in large part, on their summary of the topic.

The "Mozart Effect" was originally reported by Rauscher, Shaw, &amp; Ky (1993). In the experiment, college students completed a set of typical IQ tests. Before taking the tests, the participants were randomly assigned to either (1) listen to 10 minutes of Mozart, (2) listen to 10 minutes of relaxation instructions, or (3) sit in silence for 10 minutes. They reported that participants who listened to Mozart scored an average of 8-9 IQ points higher on the tests than the other groups.

The effect turns out to be difficult to replicate. This is nicely summarized in the introduction of Steele, Bass, &amp; Crook (1999), who also conducted a replication of the original design and found no evidence of a Mozart effect.

Your question is specifically about classical versus other kinds of music, and this is indeed a topic that has been researched as a follow-up to the Mozart Effect. One theory that arose to explain the Mozart Effect (even though the effect itself may not be all that reliable!) is that it has nothing to do with classical music in particular. Rather, the effect is simply about arousal and mood. Listening to music may not increase your intelligence, but it might make you more alert and engaged than sitting in silence or listening to a relaxation script. Schellenberg &amp; Hallam (2006) reported a study in which participants (8,000 British school children!) listened to either (1) a Mozart string quintet, (2) three pop songs, or (3) a discussion about a science experiment. The children who listened to the pop songs performed significantly better than the others, and there was no benefit of Mozart over the science discussion. Nantais &amp; Schellenberg (1999) demonstrated that there was no overall difference between listening to Mozart or an excerpt from a Stephen King story, but participants did tend to do better if they got to listen to the thing they preferred! One explanation, then, is that listening to something you like before taking an IQ test increases your performance (or, conversely, listening to something you don't like decreases performance).