quality:corruption, information:highlighting, information:classification
Education

A sample of decentration is a preschooler may use a toy banana as a pretend telephone. The child knows the difference between the fruit and a phone. In this form of play, he is operating on two levels at once. In an older child at the concrete operational level, decentration allows him to complete subtraction of two-digit numbers and indicate which of the problems also involved borrowing from the other column. The student simultaneously does both. Using reversibility, the student has to move mentally between two subtasks.