Why following arrows can leave you with a blurry mental map
Turn-by-turn directions do the navigational thinking for you. You are told when to turn, so you never have to build a picture of how the streets connect. One study describes this as "passive spatial navigation" and links it to poor spatial learning of the surrounding environment — the opposite of the active engagement that helps keep the brain sharp as we age [3].
The same study proposes a fix rather than a verdict on GPS itself: a navigation system that gives a directional sound cue, like an auditory compass, instead of spoken instructions. Users still have to decide their own route, and in that setup they built more accurate cognitive maps of the space [3]. That is a proposed alternative tested by its designers, not proof that ordinary GPS permanently damages anyone's sense of direction.
Where you look matters as much as what app you use
A real-world study with Swiss military search-and-rescue personnel — people who are already skilled navigators — found that their spatial learning improved when they directed visual attention toward the environment rather than the map [1]. The style of landmarks drawn on the mobile map (flat 2D versus realistic 3D buildings) made no difference to how they split attention or how much they learned [1].
That result comes with a scope caveat: it involved experts following a set route on a mobile map in an unfamiliar residential neighborhood during an emergency-style scenario, and it did not compare GPS against paper maps or unaided travel [1]. Still, it points to a simple idea — the screen competes with the street for your eyes, and the street is where the learning happens.
For some people, GPS buys mobility rather than costing it
In a study of 895 drivers with an average age of about 71, most used navigation assistance at least sometimes, and most often for an entire trip to a new destination [4]. Greater use was associated with worse self-rated orientation ability but not with worse performance on objective tests of spatial orientation and memory [4].
The useful twist is what GPS seemed to enable: it was positively associated with greater driving mobility, and among people with poor wayfinding ability, using it was linked to driving more [4]. Because this is an observational cohort — people reported their own usage and driving — it shows association, not cause. It is consistent with the idea that navigation aids can lower the cognitive load of an unfamiliar trip, which may matter more for someone whose confidence is the limiting factor than for someone navigating for fun [4].
Maybe the real question is how GPS fits into your habits
One philosophical analysis argues that treating GPS as a destroyer of an innate "pure" spatial memory misreads the situation. Framed instead as one part of a dynamic wayfinding ecology — a shifting mix of tools, environment, and habits — the question becomes what kind of navigator you become with the device, not whether the device erodes a fixed internal map [5].
Putting the strands together: passive turn-by-turn use is linked to weaker environmental learning [3], attention to the world rather than the screen supports learning even in experts [1], and for older or less confident drivers the aid can expand mobility without an observed objective cognitive penalty [4]. The evidence does not settle whether heavy GPS use causes lasting declines in orientation, and the studies that speak to it are small, specialized, or observational rather than direct comparisons of GPS against maps and unaided travel.
Sources used in this answer
How does the design of landmarks on a mobile map influence wayfinding experts’ spatial learning during a real-world navigation task?
In a real-world route-following task, wayfinding experts learned the environment better when they looked at the surroundings rather than the map, and 2D versus 3D landmark styles on the mobile map made no difference to attention or spatial learning.
Self-location and reorientation of individuals without Reading maps: increased spatial memory during GPS navigation using AR City walls
The paper examines GPS navigation in relation to self-location, reorientation, and spatial memory, including for people who do not read maps, but the available summary does not report a specific comparative result.
Rethinking GPS navigation: creating cognitive maps through auditory clues
Traditional turn-by-turn GPS navigation is described as promoting passive navigation and poor spatial learning, while a proposed auditory-compass GPS that makes users choose their own route was reported to yield more accurate cognitive maps.
GPS navigation assistance is associated with driving mobility in older drivers
Among 895 older drivers, navigation assistance use was associated with worse subjective orientation but not worse objective cognitive performance, and with greater driving mobility, especially in those with poor wayfinding ability.
GPS, wayfinding ecologies and the myth of pure spatial memory
The paper argues that framing GPS as part of a dynamic wayfinding ecology, rather than as a disruptor of innate spatial memory, changes what is at stake in the debate.