Investigates whether elementary school children can successfully execute a mental rotation on Marmor's state-comparison task without knowledge of logical sequence relations, whereas such knowledge is required to construct or evaluate external representations of the successive states in a rotation movement. (HOD)

The development and application of a learning procedure for the seriation structure of children in the oscilatory state are described. The procedure was based on the structural genetic theory of learning. A study consisting of design and verification stages was carried out in Cali, Colombia. In the design stage six seriation treatments involving…

In order to verify claims made by Genevan researchers that linguistic production but not comprehension capabilities distinguish seriators from nonseriators, three tasks were administered to children between the ages of four and eight. Subjects were asked to arrange in order objects varying in size, to describe how the objects differed from each…