Choose one of the four stages below. For your stage, define and fully explain the milestone (jot down notes
so that your peers can have your notes). Then, explain the milestone fully. Create a simple test/task for a
child. What should the same child be able to do before and after learning this cognitive skill?
Stage 1: sensorimotor stage – 0-2 years – object permanence
Stage 2: preoperational stage – 2-7 years – egocentrism, animism
Stage 3: concrete operational stage – 7 – 11 years – conservation of liquid, mass
Stage 4: formal operational stage – 11 years + – abstract thinking