Thursday, 6 March 2008

Don't ditch your paper maps just yet

You might think that hand-held global positioning systems (GPS), which can provide a live update of your location and surroundings, would make the benefit of a paper map redundant. But in a new study, Toru Ishikawa and colleagues have shown that people using a GPS device make more errors and take longer reaching their destination than people using an old-fashioned map.

Sixty-six participants on foot attempted to find their way to six locations in an urban environment. The routes were relatively short (between 157 and 325 yards) and each involved three turns. Twenty-two participants used a mobile phone with a GPS capability, 23 used an A4-sized map, and the remainder were taken along the routes by a researcher, before having to find their way on their own.

Not only did the GPS participants make more stops, walk further and more slowly than the map users, they also demonstrated less knowledge of the routes when asked to sketch a map of them afterwards. The most proficient participants were those who'd been shown the routes by the researchers - they arrived at their destinations faster and stopped fewer times than both the GPS and map users.

So why was the use of GPS inferior to using a paper map? The researchers said part of the explanation might be a lack of familiarity with the technology. Also, unlike the paper map, the size of the GPS screen meant it wasn't always possible to see one's own location and the destination at the same time. Finally, using GPS, which constantly updates itself, encourages people to stare down at the screen, rather than looking around at their environment. "We believe that for the development of effective navigational aids, continued empirical research on these issues is needed," the researchers said.
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ISHIKAWA, T. (2008). Wayfinding with a GPS-based mobile navigation system: A comparison with maps and direct experience. Journal of Environmental Psychology, 28(1), 74-82. DOI: 10.1016/j.jenvp.2007.09.002

Post written by Christian Jarrett (@psych_writer) for the BPS Research Digest.

3 comments:

  1. Can't read the original article, but I can say that using a GPS is something you have to learn if you want to work effectively. There are some serious issues with the study if they are taking short trips (under a mile) and the screens of the GPS units can't show the starting point and the destination.

    GPS isn't a replacement for a map (which is why the newer ones have built-in maps).

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  2. By far and away most significant and useful think about a GPS is that it tells you exactly where you are on the map.

    When I am hiking I always carry a paper map to navigate by, and a GPS set to use the same co-ordiante system. In case of any doub: consult the GPS, find out your co-ords and place yourself on the map. The ability to do this is priceless.

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  3. Both the route being short and the participants being on foot obviously (to me) biases the result against GPS.

    Being on foot means people could focalize as much attention as they needed on the paper map to analyse where they were and what path they needed to follow. While driving a vehicle, one is most unlikely to be able to safely divert one's attention from surrounding environment. Moreover, while the best path may be easily found and memorised by a human for a short route, the task would be more challenging (and again attention demanding -- a precious resource when driving) for a longer one.

    This experiment seems to have been ordered by a paper map manufacturer. These data may still be of some interest, but I don't think they could be generalised to conditions other than walkers on short routes...

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