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Perception visuelle et représentation non-symbolique des quantités chez la personne polyhandicapée adulte| old_uid | 13417 |
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| title | Perception visuelle et représentation non-symbolique des quantités chez la personne polyhandicapée adulte |
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| start_date | 2014/02/11 |
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| schedule | 13h-14h |
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| online | no |
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| location_info | D52 |
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| summary | Background : People with Profound Intellectual and Multiple Disabilities ( PIMD) experience severe to profound intellectual disability, severe motor limitations, and sensory impairments are very frequent . The study of the cognitive functions of persons with PIMD is very recent and the development of n umber representation and quantity perception in persons with PIMD has not received much attention from researchers yet. The aim of this research is to develop general knowledge on non-symbolic numerical representation in adults with PIMD through three exploratory experiments by using a visual habituation paradigm.
Method : The aim of experiment 1 is to test the capacity of adults with PIMD to retain information about the spatial organization of a small set of objects and to operate visual correspondence between two sets. Experiment 2 uses the same material and procedure than in Experiment 1 without controlling for the position of the objects in order to evaluate the role of spatiality in the detection of change in numerosity between two small sets of objects. Experiment 3 used a visual habituation procedure to investigate large quantity discrimination with regard to size and ratio effect.
Results : Experiments 1 and 2 demonstrate that persons with PIMD can retain a small quantity of objects in parallel which enable them to discriminate between two small sets of objects. The existence of a numerical magnitude approximation system is supported by Experiment 3
Conclusion : The present series of experiment do not allow us to draw conclusions about representation of number itself, but rather provide interesting information about quantity percpetion in persons with PIMD. Results provide evidence that adults with PIMD dispose of a language-independent sense of quantity, though the role of spatial cues needs to be discussed. Further research are needed to develop our comprehension of perceptual learning and cognitive functioning of persons with PIMD. |
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| responsibles | Pascalis |
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