Autonomous Physical Exploration Influences Spatial Representation: Evidence From Blind and Sighted.

Evidences demonstrated that verbal information allows to construct a mental representation of space, even for persons who have no previous experience of sight. However, the construction of a mental model from verbal description is not presentation-free, as the verbal description anchors participants to a single perspective. The aim of our study is to test the perspective of spatial representation after the physical exploration of space, in order to avoid the influence of format presentation. We asked visual impaired and sighted participants to explore autonomously a room and then to perform a Sentence Verification Task, with sentences presented in an egocentric and in an allocentric version. We measured both response time and accuracy. Data demonstrated a better performance with allocentric perspective, even if the response time suggests that participants are more confident with the egocentric perspective. In conclusion, we suggest that the physical exploration of space leads to the development of an allocentric representation