Rachel Is Visiting Her Friend Edith

Multiple Choice

Rachel is visiting her friend Edith.Edith's mom gives each of the children a can of juice and two different glasses.Even though both girls can pour the whole can into their glass, Rachel is convinced that Edith has more juice in hers because the juice is at a higher level in Edith's glass than it is in her glass.Rachel's response exemplifies which Piagetian stage of cognitive development?

A) sensorimotor
B) concrete operational
C) preoperational
D) formal operational