er at the impossible than the possible event Explanation: The word "object permanence" defines a child's ability  to realize that,although objects cannot be seen/heard, they do exist. In the theory of cognitive development created by psychologist Jean Piaget, the principle of "object  permanence" plays an important role. The infant should first create a "mental representation" of the object & realise that objects still remain in nature even though they are not seen. To determine if object permanence was present, Piaget would show a toy to an infant before hiding it or taking it away. In one version of his EXPERIMENT, Piaget would hide an object under a blanket and then observe to see if the infant would search for the object. Piaget was of the view that children unhappy that the object  had gone did not have a sense of "object permanence", whereas those who had searched for the object achieved this STAGE of development. In Piaget’s experiments, this TENDED to occur around the age of 8 to 9 months. To know more In which of Piaget's STAGES would a child be if the child has just ... brainly.in/question/9684094