Misconception on Capacity

According to Piaget’s, the children in the age around 7 will have conservation develops when they reaches the stage of concrete operations. They may believe that the amount of liquid increase or decrease when it is poured from one container to another.

The following are the video which support Piaget’s believe. The children are younger who below 8 years old. They normally judge the volume based on the length or height rather than on capacity. Please refer http://www.youtube.com/watch?v=qYtNhNP69lk&feature=related

Next example is the girl who are more mature than the above children. She is able to do reversibility and thinking concrete. She already have the concept of liquids and not disturb by the size of the container. They are able to tell why the containers have the same volume of liquids although the containers are different. http://www.youtube.com/watch?v=gA04ew6Oi9M&NR=1