" [Patricia Greenfield] concluded that “every medium develops some cognitive skills at the expense of others.” Our growing use of the Net and other screen-based technologies has led to the “widespread and sophisticated development of visual-spatial skills.” We can, for example, rotate objects in our minds better than we used to be able to. But our “new strengths in visual-spatial intelligence” go hand in hand with a weakening of our capacities for the kind of “deep processing” that underpins “mindful knowledge acquisition, inductive analysis, critical thinking, imagination, and reflection. "

― Nicholas Carr , The Shallows: What the Internet Is Doing to Our Brains