more at link …
http://www.nytimes.com/2012/02/05/opinion/sunday/is-gps-all-in-our-head.html
IT’S a question that probably every driver with a Garmin navigation device on her dashboard has asked herself at least once: What did we ever do before GPS? How did people find their way around, especially in places they’d never been before?
Like most questions asked in our tech-dependent era, these underestimate the power of the human mind. It is surprisingly good at developing “mental maps” of an area, a skill new research shows can grow stronger with use. The question is, with disuse — say, by relying on a GPS device — can we lose the skill, too?
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If maps help us, what is the problem with GPS? A lot: in my opinion, it is likely that the more we rely on technology to find our way, the less we build up our cognitive maps. Unlike a city map, a GPS device normally provides bare-bones route information, without the spatial context of the whole area. We see the way from A to Z, but we don’t see the landmarks along the way. Developing a cognitive map from this reduced information is a bit like trying to get an entire musical piece from a few notes.

