It seems there may be some others... From the wikipedia page: > According to Epilepsy Action, research has suggested that Mozart's K 448 can have the "Mozart

It seems there may be some others... From the wikipedia page: > According to Epilepsy Action, research has suggested that Mozart's K 448 can have the "Mozart effect", in that listening to the piano sonata improved spatial reasoning skills and reduced the number of seizures in people with epilepsy. Apart from Piano Concerto No. 23, only one other piece of music has been found to have a similar effect.[2] https://en.wikipedia.org/wiki/Sonata_for_Two_Pianos_(Mozart)#cite_note-2 https://en.wikipedia.org/wiki/Sonata_for_Two_Pianos_(Mozart)... If we follow the link we get this: > Apart from another Mozart Concerto, K488, only one other piece of music has been found to have a similar effect, a song by the Greek-American singer Yanni. Entitled 'Acroyali/Standing In Motion', it is featured on his album "Live At The Acropolis". This composition was chosen by researchers because it was similar to Mozart's K448 in tempo, structure, melodic and harmonic consonance and predictability. So, we have K448, K488, K545, and a Yanni song. (Piano concerto number 23 is K488.) Probably there are others, it's just hard to test every song. (It'd be interesting to see a list of all the songs that were tried that were found not to have this effect.) It's also likely that there's a kind of music that would work even better, but it hasn't been composed yet. The search space of all possible music is very large, especially if you don't constrain yourself to 12-tone equal temperament or conventional time signatures. I also wonder if it matters whether the test subject is familiar with the genre of music or not, and whether it matters whether the test subject actually likes the song or not.