Does our reliance on computers diminish our ability to think?

Is Technology Making Us Dumber? :
“Most of the time, technology works as it should. People get to their destinations faster thanks to computers. But people who rely on machines have given up something vital yet intangible. They’ve lost the ability to think it through a navigation problem themselves. They have become slaves to machines out of intellectual laziness, and the laziness makes them less smart. The brain wiring that solves navigation problems allows us to solve other problems too. Computers don’t have that flexibility, and neither do we when we abdicate our thinking to machines.”