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      The dynamic nature of cognition during wayfinding

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          Abstract

          Much of our day-to-day wayfinding behaviour takes place in familiar large-scale urban environments, yet there is a dearth of studies examining how wayfinding unfolds on a second-by-second basis in this context. Here we used a retrospective verbal report protocol, eye tracking and a highly accurate virtual reality simulation of a real city (London, UK) to examine this issue. Subjects, who were taxi drivers, were able to produce extremely detailed accounts of what they had been thinking during wayfinding, which were validated by independent eye-tracking data. There was a high degree of consistency in the types of thoughts across subjects, permitting classification into a number of distinct categories. Moreover, it was possible to quantify the number of thoughts in each category, their durations and temporal order. Detailed analysis of the verbal reports provided new insights into the processes and strategies involved, and highlighted a greater range of thoughts than has previously been reported in studies of wayfinding. By analysing the temporal order of thoughts it was possible to identify specific relationships between categories. Some of these relationships were predicted by current cognitive models of wayfinding, others were novel, thus shedding new light on how navigation unfolds in a busy city.

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          Most cited references53

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          Differences in spatial knowledge acquired from maps and navigation.

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            Thoughts, behaviour, and brain dynamics during navigation in the real world.

            How does the human brain allow us to interact with and navigate through a constantly changing world? Whilst controlled experiments using functional brain imaging can give insightful snapshots of neuronal responses to relatively simplified stimuli, they cannot hope to mirror the challenges faced by the brain in the real world. However, trying to study the brain mechanisms supporting daily living represents a huge challenge. By combining functional neuroimaging, an accurate interactive virtual simulation of a bustling central London (UK), and a novel means of 'reading' participants' thoughts whilst they moved around the city, we ascertained the online neural correlates underpinning navigation in this real-world context. A complex choreography of neural dynamics was revealed comprising focal and distributed, transient and sustained brain activity. Our results provide new insights into the specific roles of individual brain areas, in particular the hippocampus, retrosplenial, and frontal cortices, as well as offering clues about how functional specialisations operate within dynamic brain systems.
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              Navigation around London by a taxi driver with bilateral hippocampal lesions.

              The time-scale of hippocampal involvement in supporting episodic memory remains a keenly debated topic, with disagreement over whether its role is temporary or permanent. Recently, there has been interest in how navigation by hippocampally-compromised patients in environments learned long ago speaks to this issue. However, identifying patients with damage that is primarily hippocampal, control subjects matched for navigation experience, and testing their in situ navigation, present substantial problems. We met these challenges by using a highly accurate and interactive virtual reality simulation of central London (UK) to assess the navigation ability of a licensed London taxi driver who had sustained bilateral hippocampal damage. In this test, patient TT and matched control taxi drivers drove a virtual London taxi along the streets they had first learned 40 years before. We found that the hippocampus is not required for general orientation in the city either in first person or survey perspectives, detailed topographical knowledge of landmarks and their spatial relationships, or even for active navigation along some routes. However, in his navigation TT was very reliant on main artery or 'A' roads, and became lost when navigation depended instead on non-A roads. We conclude that the hippocampus in humans is necessary for facilitating navigation in places learned long ago, particularly where complex large-scale spaces are concerned, and successful navigation requires access to detailed spatial representations.
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                Author and article information

                Journal
                J Environ Psychol
                Journal of Environmental Psychology
                Academic Press
                0272-4944
                September 2008
                September 2008
                : 28
                : 3
                : 232-249
                Affiliations
                Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, UK
                Author notes
                [* ]Corresponding author. Current address: Department of Psychology, Institute of Behavioural Neuroscience, University College London, 26 Bedford Way, London WC1H 0AP, UK. Tel.: +44 20 7679 7553; fax: +44 20 7813 1420. h.spiers@ 123456ucl.ac.uk
                Article
                YJEVP498
                10.1016/j.jenvp.2008.02.006
                2660842
                19325934
                879b1845-7ffb-45a9-9ed2-bd1ed80f6a84
                © 2008 Elsevier Ltd.

                This document may be redistributed and reused, subject to certain conditions.

                History
                Categories
                Article

                Clinical Psychology & Psychiatry
                virtual reality,spatial memory,routes,navigation,verbal reports,planning

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