Turn-by-turn route guidance does not impair route learning

Turn-by-turn GPS guidance is useful when the navigator is uncertain about the correct route. Although route guidance is convenient, it comes at a spatial cognitive cost. Compared to unguided navigation, route guidance leads to poorer knowledge of the traversed environment. However, past research has not tested the effects of route guidance on route retracing, which is an important learning goal in many situations. Participants drove a pre-defined route in a driving simulator. All participants initially followed turn-by-turn directions twice (Experiment 1) or once (Experiment 2). Those in the Study condition continued to follow route guidance during two subsequent traversals, whereas those in the Test condition relied on memory and received corrective feedback. Following a 48-hour delay, participants completed a final test in which they retraced the route without guidance. Learning condition did not influence final test performance, indicating that route knowledge is unaffected by repeatedly following route guidance.