Lo he conocido en el blog de Nic Carr ( http://tinyurl.com/68lb3r ) y destaco el mismo párrafo que destaca él:

The Swiss developmental psychologist Jean Piaget described two processes that he believed lay behind the development of knowledge in children. The first is assimilation, where new knowledge fits into existing conceptual frameworks. More challenging is accommodation, where the framework itself is modified to include the new information.

The current generation of ’search engines’ seem to encourage a model of exploration that is disposed towards assimilative learning, finding sources, references and documents which can be slotted into existing frameworks, rather than providing material for deeper contemplation of the sort that could provoke accommodation and the extension, revision or even abandonment of views, opinions or even whole belief systems.
Perhaps the real danger posed by screen-based technologies is not that they are rewiring our brains but that the collection of search engines, news feeds and social tools encourages us to link to, follow and read only that which we can easily assimilate.