Switching between the Forest and the Trees: The Contribution of Global to Local Switching to Spatial Constructional Abilities in Typically Developing Children.

Background: Spatial analysis encompasses the ability to perceive the visual world by arranging the local elements ("the trees") into a coherent global configuration ("the forest"). During childhood, this ability gradually switches from a local to a global precedence, which contributes to changes in children's spatial construction abilities, such as drawing or building blocks. At present, it is not clear whether enhanced global or local processing or, alternatively, whether switching between these two levels best accounts for children's spatial constructional abilities.

Methods: We assessed typically developing children 7 to 8 years old on a global/local switching task and on two widely used spatial construction tasks (the Rey-Osterrieth Complex Figure and the Block Design test).

Results: The ability to switch from global to local level, rather than a global or a local advantage, best accounted for children's performance on both spatial construction tasks.

Conclusions: The present findings contribute to elucidate the relationship between visual perception and spatial construction in children showing that the ease with which children switch perception from global to local processing is an important factor in their performance on tasks requiring complex drawing and block assembling.