1987'4, p.135
Veraksa N. E.
Appearance of prerequisites of dialectical thinking in pre-school age

Prerequisites for appearance of dialectical thinking in preschool age have been studied. Specificity of dialectical thinking consists in application of particular dialectical mental operations (such as combination, mediation, reversal, changing of alternatives, transformation) when dealing with contradictory situations. Essential characteristic of these operations consists in the fact that they require ability to operate with mutually incompatible relations. Some experimental results are provided proving that preschool children can successfully employ the operations.