The Sonata for Two Pianos in D major, K. 448 is a piano work composed in 1781 by Wolfgang Amadeus Mozart, at 25 years of age. It is written in strict sonata-allegro form, with three movements. The sonata was composed for a performance he would give with fellow pianist Josephine von Aurnhammer. Mozart composed this in the galant style, with interlocking melodies and simultaneous cadences. This is one of his only formal compositions written exclusively for two pianos. This sonata was also used in the scientific study that tested the theory of the Mozart Effect, suggesting that classical music increases brain activity more positively than other kinds of music.
According to the British Epilepsy Organization, 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 reduce the number of seizures in people with epilepsy. - wiki
