Visuo-spatial training is considered a promising approach to provide young children with a sound foundation for later mathematical learning. We developed and implemented a tablet-based visuo-spatial intervention in kindergarten classrooms aiming to foster the development of children's visuo-spatial and numerical abilities. A sample of N = 125…

Twenty-seven kindergarten subjects were trained on two different double classification matrix tasks to determine whether they were hierarchically related. Prior behavioral analyses had shown one task to be simpler than the other. It was assumed that, in hierarchical transfer relationships, one order of task acquisition is more favorable than…