If Mozart Increases Spatial Intelligence for some, What does Hip Hop do?

To be clear, there is no assertion that hip hop doesn't increase some kind of intelligence. The question is only what kind?

from Miller-McCune Online Magazine:
"Researchers from the University of London have tested a thesis that may explain why studies of this phenomenon have produced such inconsistent results. In a study just published in the journal Psychology of Music, they conclude that listening to Mozart can indeed spark a certain type of intelligence, but the effect is limited to non-musicians. The reason, it appears, has to do with the different ways musicians and non-musicians process music in the brain.

The term “Mozart effect” can be traced back to a 1993 study, in which a research team led by Frances Rauscher reported that a group of college students outperformed their peers on a test measuring a specific kind of spatial intelligence after listening to one of the Austrian composer’s works: The Sonata for Two Pianos, K. 448.

The test subjects were asked to mentally unfold a piece of paper that had been folded over several times and then cut. Those who listened to Mozart were able to identify the correct shape of the unfolded paper more quickly than those who had sat in silence for 10 minutes, or those who had listened to a tape of relaxing sounds.