Serge watches as two lines of pennies (with eight pennies in each line) are laid out so that both lines are the same length. When asked, Serge says both are equal. Then the researcher takes the pennies in one line and places them farther apart, making that line longer than the other. Now serge says that line has more than the shorter line. What cognitive skill has Serge not yet developed, according the Piaget?
A) counting
B) conventionalism
C) centrism
D) reversibility

Question

Quizplus · Accepted Answer

Serge has not yet developed the cognitive skill of reversibility, which is the ability to understand that objects can be changed and then returned back to their original form or condition. In this case, Serge does not understand that spreading the pennies out does not change the number of pennies.

Serge Watches as Two Lines of Pennies (With Eight Pennies