Route learning and shortcut performance in adults with intellectual disability: A study with virtual environments

Mengue-Topio, Hursula; Courbois, Yannick; Farran, Emily K.; Sockeel, Pascal

doi:10.1016/j.ridd.2010.10.014

Cited by 50 publications

(28 citation statements)

References 22 publications

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“…Survey knowledge provided by both slanted and survey perspectives may include relational information about landmarks or road segments between which direct travel has never occurred. The ability to find novel shortcuts between two points is considered to be characteristic of survey knowledge [1], [33]–[35] and the difficulty of finding a shortcut after a route-perspective encoding might be interpreted as reflecting the difficulty of developing an effective strategy to find shortcuts using only coarse and possibly nonmetric spatial knowledge derived from route-perspective encoding.…”

Section: Discussionmentioning

confidence: 99%

Does an Oblique/Slanted Perspective during Virtual Navigation Engage Both Egocentric and Allocentric Brain Strategies?

et al. 2012

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Perspective (route or survey) during the encoding of spatial information can influence recall and navigation performance. In our experiment we investigated a third type of perspective, which is a slanted view. This slanted perspective is a compromise between route and survey perspectives, offering both information about landmarks as in route perspective and geometric information as in survey perspective. We hypothesized that the use of slanted perspective would allow the brain to use either egocentric or allocentric strategies during storage and recall. Twenty-six subjects were scanned (3-Tesla fMRI) during the encoding of a path (40-s navigation movie within a virtual city). They were given the task of encoding a segment of travel in the virtual city and of subsequent shortcut-finding for each perspective: route, slanted and survey. The analysis of the behavioral data revealed that perspective influenced response accuracy, with significantly more correct responses for slanted and survey perspectives than for route perspective. Comparisons of brain activation with route, slanted, and survey perspectives suggested that slanted and survey perspectives share common brain activity in the left lingual and fusiform gyri and lead to very similar behavioral performance. Slanted perspective was also associated with similar activation to route perspective during encoding in the right middle occipital gyrus. Furthermore, slanted perspective induced intermediate patterns of activation (in between route and survey) in some brain areas, such as the right lingual and fusiform gyri. Our results suggest that the slanted perspective may be considered as a hybrid perspective. This result offers the first empirical support for the choice to present the slanted perspective in many navigational aids.

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Section: Discussionmentioning

confidence: 99%

Does an Oblique/Slanted Perspective during Virtual Navigation Engage Both Egocentric and Allocentric Brain Strategies?

et al. 2012

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“…Mengue-Topio et al [5] experimented with virtual environments to assess the ability of route learning, and being able to make shortcuts between two locations was carried on 18 adults with ID and 18 adults without disabilities. This experiment comprised of the exploration of two routes until each adult reached a learning criterion.…”

Section: Related Workmentioning

confidence: 99%

Developing Navigational Services for People with Down's Syndrome

Kramer

Covaci

Augusto

2015

2015 International Conference on Intelligent Environments

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Abstract-The ability to commute and travel alone is an important skill that enables people to be more independent, and integrated with society. People with Down's Syndrome often experience low social integration, and low degree of independence. As part of the European Commission funded POSEIDON project, we want to explore how context-aware, and assistive technology can enable users with Down's Syndrome be more independent, including the ability to commute alone to a place of interest. In this paper, we report on our current progress in developing navigational services within the context of the POSEIDON project. We carried out a semi-structured qualitative evaluation of an early version of our navigational services with 6 individuals with Down's Syndrome, and report on our findings.

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“…Reduced opportunities for independent navigation and active exploration in real‐world environments may inhibit individuals with physical disabilities from acquiring allocentric knowledge (Foreman, ; Foreman, Stanton, Wilson & Duffy, ). Findings have suggested that this may also be the case for individuals with learning difficulties (Farran et al ., ; Mengue‐Topio, Courbois, Farran & Sockeel, ). Given the time restraints and physical demands involved in navigating a route multiple times, real‐world tasks in WS may be limited by the scope of experience that each participant can gain from an environment.…”

Section: Introductionmentioning

confidence: 99%

Egocentric and allocentric navigation strategies in Williams syndrome and typical development

Broadbent

Farran

Tolmie

2014

Developmental Science

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Recent findings suggest that difficulties on small-scale visuospatial tasks documented in Williams syndrome (WS) also extend to large-scale space. In particular, individuals with WS often present with difficulties in allocentric spatial coding (encoding relationships between items within an environment or array). This study examined the effect of atypical spatial processing in WS on large-scale navigational strategies, using a novel 3D virtual environment. During navigation of recently learnt large-scale space, typically developing (TD) children predominantly rely on the use of a sequential egocentric strategy (recalling the sequence of left-right body turns throughout a route), but become more able to use an allocentric strategy between 5 and 10 years of age. The navigation strategies spontaneously employed by TD children between 5 and 10 years of age and individuals with WS were analysed. The ability to use an allocentric strategy on trials where spatial relational knowledge was required to find the shortest route was also examined. Results showed that, unlike TD children, during spontaneous navigation the WS group did not predominantly employ a sequential egocentric strategy. Instead, individuals with WS followed the path until the correct environmental landmarks were found, suggesting the use of a time-consuming and inefficient view-matching strategy for wayfinding. Individuals with WS also presented with deficits in allocentric spatial coding, demonstrated by difficulties in determining short-cuts when required and difficulties developing a mental representation of the environment layout. This was found even following extensive experience in an environment, suggesting that - unlike in typical development - experience cannot contribute to the development of spatial relational processing in WS. This atypical presentation of both egocentric and allocentric spatial encoding is discussed in relation to specific difficulties on small-scale spatial tasks and known atypical cortical development in WS.

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Route learning and shortcut performance in adults with intellectual disability: A study with virtual environments

Cited by 50 publications

References 22 publications

Does an Oblique/Slanted Perspective during Virtual Navigation Engage Both Egocentric and Allocentric Brain Strategies?

Does an Oblique/Slanted Perspective during Virtual Navigation Engage Both Egocentric and Allocentric Brain Strategies?

Developing Navigational Services for People with Down's Syndrome

Egocentric and allocentric navigation strategies in Williams syndrome and typical development

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