In one study, Piaget showed children a row of cups and asked them to place an egg in each. Afterward, Piaget spread the eggs out in a long line that extended beyond the row of cups. Children who were in the stage of cognitive development incorrectly claimed that there were more eggs than cups because the row of eggs was longer than the row of cups.

The correct answer is preoperational

It mainly characterizes this stage, the establishment of the notion of object, without it being close, imagination skills and imitation of objects also strongly characterizes this stage, performed in the sensorimotor stage more in a maternal and initial way. For it is when the child comes to know and assimilate the environment in which it consists, that is, it is a new type of action that is internalized.

At this stage, strongly marked by the use of symbolic games, and language as a form of communication, and the proper assimilation of concepts, we should also highlight egocentrism, which is also part of this phase, around the age of 6 and 7, where the child attributes an egocentric speech, inserting the self in the media, and the inability to put yourself in the other's place.

The egocentric language is noticeable when the child is in contact with another one, because the dialogue is almost non-existent, what exists is a form of monologue, the child in this stage, is not concerned with the interaction, or concern for being receiving attention or not, do not attribute speech to anyone.

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