1990'5, p.65
Poddyakov A. N.
Combinatorial experimentation on multi-loop object - "blach box" - by preschoolers
(RESUME)

Children's capacities of using various combined actions on a multi-loop object - "black box" - and capacities of factor's interaction in this object comprehension have been investigated. It has been found that features of children's experimentation on the object are determined by three interrelated factors: a) variety of testing actions of the child on explored object, b) information obtained by these actions, c) level of comprehension of the obtained information. It has been established that 5 years old children actively utilaze some methods of combinatorics in input actions. On this basis the subjects understand relationships characterized by interaction of several factors in these multi-loop objects.